best tranny, rear end, converter combo? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-29-2004, 11:50 PM
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best tranny, rear end, converter combo?

Hello all. Currently I am running a th-350, 4.10 gears, and an 1600 stall in my 66 gmc 3/4 ton 2wd truck. I am going to be changing all of this soon. The engine is a 355 TPI setup. I will also be adding a Trickflow Heads/cam kit as well as a 100hp shot of nitrous within the next 3 months. It is my daily driver as well as drag car and would like to keep it that way. I would like to swap in a 700r4 and goto 3.42 gears (as the 700 has a lower first gear would would help makeup for the different gears). I would like something that is not going to be turning 3000 rpm at 60 mph lol. I guess I'd like to have my cake and eat it too. I am not too concerned with super hard launches, Id rather have a steady pull of acceleration. The TPI's run out of breathing room around 4800 rpm stock (though I have the big mouth and larger runners which has bumped that up a few hundered RPM).

Currently it runs about a 15.3 in the quarter and would like to improve this as well as my cruising ability (I think the head/cam combo will do nicely as its currently running a Edelbrock performer cam and stock untouched heads).

Any recommendations on a rear gear and converter would be greatly appreciated. If you have any thoughts on the tranny please let me know. I believe my weight to be 4500 or so pounds, give or take 100.

Also has anyone had experience with Bowtie overdrives and if so what are your opinions on them as far as quality is concerned.

Thanks a bunch.

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Old 08-31-2004, 07:04 PM
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My only recommendations would be 2000 stall converter, and 3.73 gears.
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Old 08-31-2004, 07:44 PM
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I would leave the 4.10 in the rear. 700R4's are 30% OD .

4.10 minus 30% is 2.87 final drive (OD)

The 700R4 has a 3.06 first gear (versus 2.52 for the T-350) so it should launch better also.


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