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| matts85vet | did i buy the right part? | ||
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Guru
 
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did i buy the right part?
i got my order from corvette central for my gear swap i got: 45t driven gear gm#25513052 lt blue 15t drive gear gm#12507670 gray setup is : 315/35/17 tires 3.75 rear gear 700r4 |
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Posted on: 2010/10/28 18:39
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85 coupe, 383, TPIS Miniram, auto 700R4, 3.75 gears, afr 180 eliminator heads 58cc, 12:1 compression ratio, comp cams 280XFI hydraulic roller cam, 1.65 roller rockers, 52mm throttle body, c5 calipers, hedman elite longtube headers, pypes dual exhaust w/x- |
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| pr0zac | Re: did i buy the right part? | ||
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i dont have an answer to your question but was wondering what your setup runs?
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Posted on: 2010/10/28 23:06
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96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit. |
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| matts85vet | Re: did i buy the right part? | ||
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i have no idea
haven't been to the track - yet |
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Posted on: 2010/10/29 2:21
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85 coupe, 383, TPIS Miniram, auto 700R4, 3.75 gears, afr 180 eliminator heads 58cc, 12:1 compression ratio, comp cams 280XFI hydraulic roller cam, 1.65 roller rockers, 52mm throttle body, c5 calipers, hedman elite longtube headers, pypes dual exhaust w/x- |
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| Livin_the_dream | Re: did i buy the right part? | ||
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I seem to remember Pete K posting something about this. Send him a pm and he may have an answer for you
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Posted on: 2010/10/29 2:23
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| Matatk | Re: did i buy the right part? | ||
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Did you use Kevin's (CentralCoaster) website?
Your parts list: New Drive Gear: GM # 8642620 - 15 tooth, grey New Driven Gear: GM # 25513052 - 45 tooth, lt blue New speedometer sensor: GM # 25007308 (These parts are ideal for a 26 inch tire. At 60 mph, your speedo will read 60.8 MPH.) |
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Posted on: 2010/10/29 3:01
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| CentralCoaster | Re: did i buy the right part? | ||
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Drive gear you listed has the correct teeth, but different p/n. Depends on which transmission. Did you enter that and year correctly into the website? Also it should tell you what RPO came with those gears, which tells you what should be on the car to begin with.
And if you don't want to change the drive gear, there are still options for changing the driven gear, but may not be as accurate. I think my speedo gear calculator is in the tech library also. |
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Posted on: 2010/10/29 4:43
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1985 Z51, ZF6 |
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| PeteK | Re: did i buy the right part? | ||
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Quote:
I am holding both GM gears in my hand. The driven gear number is correct. The drive gear number is incorrect (unless GM changed the part number in the past 18 months, and your number supercedes my number. Drive Gear 15 Tooth- 8642620 |
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Posted on: 2010/10/29 11:53
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| vetteoz | Re: did i buy the right part? | ||
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Senior Guru
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Quote:
PeteK wrote:The drive gear number is incorrect (unless GM changed the part number in the past 18 months, My T700 gear bought six months ago has same # as yours Google shows GM # 12507670 as a ZF6 speedo gear; cross references to ZF part # 0501 310 389 ( from ZFDoc ) |
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Posted on: 2010/10/29 12:17
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| CentralCoaster | Re: did i buy the right part? | ||
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Yup, he bought a ZF gear, not a 700R gear and I have to assume they are different.
You can probably find photos of both on ac-delco's parts catalog. |
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Posted on: 2010/10/29 19:30
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1985 Z51, ZF6 |
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| matts85vet | Re: did i buy the right part? | ||
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thanks for the responses!
well it looks like its the wrong one then. ill have to get the 8642620. it's not worth sending the other one back, so i'll compare them and see |
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Posted on: 2010/10/29 21:08
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