a4 gear question ASAP !

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May 17, 2010 | 09:10 PM

Pate_2008

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From: Emporia, Ks

a4 gear question ASAP !

I have a 4l60e with a yank 4000 will be running a 28" tall tire. Spraying a 125 shot and i have a 233/239 cam l92's ls3 manifold should i get a 3.73 gear or a 3.90 or what?

May 17, 2010 | 09:19 PM

69_YENKO

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From: San Angelo, TX

I haven't installed everything yet to test out the combo but after looking at some gearing calculators I went with 3.90's for mine.

4l60e/ SS3800/ 28" tire/ 150-200shot/ tfs235's

with the 28" tire I wanted the extra gear, if i was staying 26" i would have just gone with 3.73s

May 17, 2010 | 09:24 PM

Pate_2008

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From: Emporia, Ks

ok i just wanna make sure. because i will be spraying and going through the traps in 3rd gear and dont wanna run out of gear

May 18, 2010 | 05:51 PM

MikeG

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It depends on how efficient your converter is. The 3.90s could be close, the 3.73s should be more than fine.

May 19, 2010 | 07:07 AM

SS SLP2

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From: SILSBEE TX

Quote:

Originally Posted by Pate_2008

I have a 4l60e with a yank 4000 will be running a 28" tall tire. Spraying a 125 shot and i have a 233/239 cam l92's ls3 manifold should i get a 3.73 gear or a 3.90 or what?

My cam is smaller (231/237) same tire/same yank will shift @6500/limit @6700 I will install 9"/4.11 with next week or so only hope I can make thow the traps with out going into OD, so will find out later which gear is best.
last year with 10 bolt/3.73/25.5 tire trapping 124.5
Johnny

Last edited by SS SLP2; May 19, 2010 at 11:16 AM.

May 19, 2010 | 10:13 AM

Silver LS1

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I went 10.50 at 130mph, with a 4400 converter and gobs of NOS. I would make sure you can lock up the converter in drive (3rd gear), and run a 4.10 gear. Then converter effiecency isnt a factor. 3.90s will be fine too. If you stick with slicks, a 4.10, if you run radials then a 3.90. Hope that helps!