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| PeteK | Diffferent gear ratio's for 700R4 | ||
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Moderator
 
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Well,
They are finally available. A different sun and planet assembly for a 700r4 an 4l60e. It allows turbo 350 type gear ratio's in a 4 speed auto. $1,150 Plus shipping. I would love to buy a set and R&D them, as they claim 3 tenth reduction. Too rich for my wallet though. If anyone does buy them, let me know your opinions. |
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Posted on: 2009/8/16 16:36
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| bogus | Re: Diffferent gear ratio's for 700R4 | ||
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Grand Imperial Pooh-Bah
 
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wow. so you get th350 ratios in 1-2-3 along with the OEM OD in 4th?
combine that with 3.73 rear gears and that would rock. |
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Posted on: 2009/8/16 16:41
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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Yes sir!
Sounds like a winner. |
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Posted on: 2009/8/16 16:45
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| mseven | Re: Diffferent gear ratio's for 700R4 | ||
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who is the mfg.?
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Posted on: 2009/8/16 22:40
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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A trans shop in the Bronx, Ny.
I believe it is CK trans. They are only dealing through PATC though. I just got an e-mail from Don @ PATC. He can do $1,049 plus shipping for me if I provide R&D results. |
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Posted on: 2009/8/16 22:45
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| bogus | Re: Diffferent gear ratio's for 700R4 | ||
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Grand Imperial Pooh-Bah
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$50 for r&d???
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Posted on: 2009/8/17 14:00
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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It works out to an $85 discount after shipping.
I will document the gains or losses with multiple converter's and trans combinations. Stay tuned!! |
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Posted on: 2009/8/18 18:25
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| rklessdriver | Re: Diffferent gear ratio's for 700R4 | ||
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Senior Guru
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This is a mighty expensive option just to keep a 4L60/700R4.
Besides GM already made a 4spd auto overdrive trans with a close ratio gear set. What's wrong with building/running a 200R4 Pete? Is it just the fact that the 4L60 is the factory desgined unit for the C4? Will |
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Posted on: 2009/8/18 18:30
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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Will,
The 200 planetary's are junk. To build them solid costs big money. The case does not allow retrofitting without major fabrication, as the tailhousing and case are 1 pc. A typical 4l80e conversion runs 5K or more. Although the 700 has a reputation for being weak, mine hold up, and durability is not a concern. Someone has to qualify, or disqualify this gearset. Might as well be me. I may very well have wasted $1700 or so, as I have to put together a fresh trans for proper testing. We'll see. |
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Posted on: 2009/8/18 18:38
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| BeachBum | Re: Diffferent gear ratio's for 700R4 | ||
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Master Guru
 
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Yeah, I've never heard anything good about the factory 200R4's, I know the Turbo Buick guys use to grenade them frequently. But, I never knew why until now.
On the gear set, I think the real advantage is the slap back rpm on the 1/2 shift.....with this I think their is et, but the change to the gears also necessitates a rear gear change, otherwise you might find yourself losing et considering the 1st gear total ratio is the most important for acceleration in my opinion. I know I used to race a friend who had a mid 60's small body Nova, we were dead-on with each other down the track, almost identical 60's and trap speeds, but he'd run 4 or 5 hundredths quicker than me and it happened during that 1-2 shift, we'd be next to each other on the strip, he'd shift and jump on me 1/2 car.... from their on out that distance was maintained. With that said, its my opinion that the gear ratio advantage in a 1/4 mile race is approxmiately 4-6 hundredths..... or thereabouts anyway. Which is pretty stout I might add and worth it to some.... and maybe even me. There might be other gains with efficiency, but not sure..... somebody else would have to answer that, but as we all know a th350 is approxmiately 3-5% more efficient than a th400 as per the dyno's of the world.... maybe this gear set finds some of this increased efficiency in a 700R4.... I don't know.... will be interesting tests Pete ! I'll be watching. |
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Posted on: 2009/8/18 19:36
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863 cubic inches of C4 & C6 muscle C6 Corvette Z06 - Lemans Metallic Blue C4 Corvette 436 - Pure Black http://www.cardomain.com/ride/3933547 ... chevrolet-corvette/page-1 |
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| rklessdriver | Re: Diffferent gear ratio's for 700R4 | ||
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Gotcha. I knew the 200R4 tail housing would be a PITA to fabricate up for a C4, but I didn't know the planatery gear sets were so weak in them.
The Turbo Buick guys I know are all bunch of lying MFer's... They tell you they are runinng 30+lbs of boost (all on dead stock 120K mile bottom end of course), never burn pistons, never blow head gaskets, still running the stock 200R4 and 3.42 10 bolt both of which never grenade... Will |
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Posted on: 2009/8/19 16:33
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| anesthes | Re: Diffferent gear ratio's for 700R4 | ||
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Master Guru
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Quote:
The 200R sounded great until you brought this up the other day.. Too bad. I have a Th350 now. I'd like an overdrive gear for highway, but I was not happy with the last 700R4 I had. Plus converters for 700R4s are way more money. -- Joe |
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Posted on: 2009/8/19 17:36
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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My guys build one for $525 and it rivals or exceeds all converters I am aware of. What makes a 700r4 converter really expensive is the $200 billet back. That is what shoots them up into the $700+ bracket. I think it is overkill, but some guys want "the best" and lay out the dough. Until I see the need for one, my converters will have the standard back, with the stiffening ring. $525 is not so bad for a quality converter.
Quote:
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Posted on: 2009/8/19 23:04
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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Do you guys want me to snap pics during the trans build up?
I can do a step by step here, I just have to learn how to post pics. Because I have nearly no spare time, it may take a few weeks to get to the end of the project. The trans I am building will be the same as the one currently in the car, but with a better 3-4 clutch pack. This will allow me to do a trans swap to test the new gearset. |
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Posted on: 2009/8/22 13:38
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| Matatk | Re: Diffferent gear ratio's for 700R4 | ||
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Webmaster
 
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Pete, I'd love to see pics. If you need help with the pictures, let me know, I can steer you in the right direction.
Matthew |
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Posted on: 2009/8/22 14:32
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| Aardwolf | Re: Diffferent gear ratio's for 700R4 | ||
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Senior Guru
 
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Better 3/4 pack?
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Posted on: 2009/8/22 14:36
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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Quote:
I have a shitty 3-4 pack in my current trans. I went low buck last time. The goal is to build a carbon copy of the trans in my car now for accurate compaison of the gear ratio's. The better 3-4 pack will ensure zero clutch slippage, and should not affect anything else. |
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Posted on: 2009/8/22 14:43
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| Aboatguy | Re: Diffferent gear ratio's for 700R4 | ||
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Senior Guru
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Pete I'd love to see the build and results too.
Seems like I've been waiting for this gearset to be released for years now...but it probably has been listed on the website for less time than that. It figures that I just had my tranny rebuilt a couple of months ago. Mike |
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Posted on: 2009/8/22 18:48
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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Quote:
I will start another thread on the trans build. Bear with me everyone, as spare time is very limited for me. If I can get this trans built by the end of September, I have a shot at testing it during October. I travel for a living, and I am only home a couple of days a week. I am very curious to see what the outcome is regarding ET reduction and/or MPH improvement in the 1/4 mile. Mike, If the gearset is something you would want to install in your trans, it is something you could do yourself. Once the trans is out of the car and on the bench, it is only about 2 hours work to rip it down to the forward planet, and reassemble. Maybe $50 in parts, plus the cost of the gears. Don, at PATC keeps telling me to expect 3 tenths in the 1/4 mile. |
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Posted on: 2009/8/22 20:30
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| Aboatguy | Re: Diffferent gear ratio's for 700R4 | ||
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Senior Guru
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Pete, I'm Looking forward to your results....maybe the close ratio gear set will be worth pulling trans again. It seems like I just got everything in the driveline to where it seems ROCK SOLID again. I can't believe I broke an aftermarket (company has a decent repution) stall converter on the street using street tires.
My new 3500 vig seems tighter around town than my old 2800 did but when its floored I can tell the difference (had to lower the shift points a little because it was bouncing off of the limiter, fuel cutoff is set at 7005 resume 6988. God I love a high reving SBC>>>>> As for the gearset I've been following it on the PATC website for what seems like forever, and if it truly is doable on a bench without a bunch of special tools in a couple of hours, I'm probably interested. However, just spent this quarters and probably part of next quarters mod money.......Hopefully this congress leaves enough in the coffers for me to get an income tax rebate next season. MIke |
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Posted on: 2009/8/25 1:41
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| PeteK | Re: Diffferent gear ratio's for 700R4 | ||
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I just learned it was shipped today, and should arrive while I am at Corvettes at Carlisle.
The overhaul parts I needed were shipped too, and should arrive tomorrow. I will post pics of it when I return. |
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Posted on: 2009/8/25 14:27
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"It was really on a pass until it came apart." "Yeah. They always are." |
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