C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

speedo gear for 700r4

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Old Apr 29, 2002 | 11:45 AM
  #1  
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Default speedo gear for 700r4

does anyone know what speedo gear is needed for a 700r4 with 3.54 rearend gears


[Modified by meach13, 9:46 AM 4/29/2002]
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Old Apr 29, 2002 | 12:52 PM
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Default Re: speedo gear for 700r4 (meach13)

8648680 gear, 25513050 gear, and 10456089 sensor if you are going from the 2.59s to 3.54s. Total shipped to my door $36.62. Give Jeff Kopp a call at Superior Chevy 1-800-728-8267 and let him know you're on the forum. :cheers:
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Old Apr 29, 2002 | 02:41 PM
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Default Re: speedo gear for 700r4 (meach13)

What size is your rear current rear end? You may or may not need a new VSS.
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Old Apr 29, 2002 | 03:04 PM
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Default Re: speedo gear for 700r4 (meach13)

http://www.corvetteforum.net/c4/vett...Gearshtm.shtml

Compliments of Vettenuts
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Old Apr 29, 2002 | 05:39 PM
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Default Re: speedo gear for 700r4 (-=Jeff=-)

Jeff, that chart is good for stock gm ratios. They didn't offer the 3.54 in the autos(MD8) though. :cheers:
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Old Apr 29, 2002 | 05:44 PM
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Default Re: speedo gear for 700r4 (Ramrod92)

Jeff, that chart is good for stock gm ratios. They didn't offer the 3.54 in the autos(MD8) though. :cheers:
Yeah but the speedo gears are interchangable for manuals and autos.
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Old Apr 29, 2002 | 07:04 PM
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Default Re: speedo gear for 700r4 (dgoodhue)

I thought they were too, but the part number for the drive gear on my reciept from Jeff doesn't match. My number shows 8648680, while the chart shows 12507670. The driven gear and the VSS match though. :confused:


[Modified by Ramrod92, 5:05 PM 4/29/2002]
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Old Apr 29, 2002 | 07:05 PM
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Default Re: speedo gear for 700r4 (Ramrod92)

I'll second going with Jeff Kopp. I got my gears from Him.(D44 3.45:1)

He'll treat you right! Make sure if you haven't ordered from Him before to mention you're a forum member. He'll give you 10% above cost for that alone. He's a super person to deal with too. Wait and see for yourself.
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Old Apr 30, 2002 | 10:31 AM
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Default Re: speedo gear for 700r4 (Ramrod92)

I thought they were too, but the part number for the drive gear on my reciept from Jeff doesn't match. My number shows 8648680, while the chart shows 12507670. The driven gear and the VSS match though. :confused:
The difference is Part number changes/updates.
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Old Apr 30, 2002 | 10:35 AM
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Default Re: speedo gear for 700r4 (dgoodhue)

:yesnod: :yesnod: On Jeff....He is the Man!! got the same great deal on my D44 3.45 swap. :seeya
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