th400 problems

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Jul 2, 2011 | 02:30 AM

kalildude

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th400 problems

i have a th400 with a 3800 stall and it seems like the top speed is 80 mph. do th400s shift at a different rpm? why does it basicly max out at 80?

Jul 2, 2011 | 05:28 AM

Z28/2002

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From: Your girl's back door giving her the long stroke while you're at work

What is the gear in the rearend

Jul 2, 2011 | 10:28 AM

SuperSlow02

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Are you sure your shifting into 3rd. I have a 4.11 rear gear and I'll top out at 135-140

Jul 8, 2011 | 03:08 AM

kalildude

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4.11 it shifts at 5500rpm and yea its in third.

Jul 8, 2011 | 09:34 AM

SuperSlow02

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What rpm is it pulling at 70mph?

Jul 9, 2011 | 05:35 AM

kalildude

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5000 range

Jul 9, 2011 | 08:18 AM

Duffster

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4.11 in 3rd gear should be near 3900ish

You're still in 2nd gear...

http://www.kabamus.com/garage/gears.html

based on a 1st gear - 2.48, 2nd gear - 1.48, 3rd gear 1.00

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Jul 9, 2011 | 06:46 PM

kalildude

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i swear im in third i did a dig and it shifted twice. no i fabricated a bracket to where i can use my stock shifter

Jul 9, 2011 | 06:50 PM

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kalildude

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i went to that website. see what you find out? i have 305/45/18 drags and its saying at 6500 rpm my mph is 84 something?

Jul 9, 2011 | 09:14 PM

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Duffster

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yes, 84.5 at 6000 rpm in 2nd gear!
125.1 at 6000 rpm in 3rd gear

RPM - 8000 7500 7000 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000

3rd Gear 166.8 156.4 146 135.5 125.1 114.7 104.3 93.83 83.41 72.98 62.56 52.13 41.7 31.28 20.85
2nd Gear 112.7 105.7 98.62 91.58 84.53 77.49 70.45 63.40 56.36 49.31 42.27 32.22 28.18 21.13 14.09

Jul 11, 2011 | 04:58 AM

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kalildude

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I have a stock motor but it is procharged and running 7 pounds. I don't get what's wrong. I did hit 100 just recently and that was at 6500 rpm

Jul 19, 2011 | 12:37 AM

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fastsspr

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Quote:

Originally Posted by kalildude

I have a stock motor but it is procharged and running 7 pounds. I don't get what's wrong. I did hit 100 just recently and that was at 6500 rpm

Man you going to hurt that motor doing that. I think too you are in second gear!

Jul 19, 2011 | 11:00 AM

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Heads-Up-Outlaw

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What is the fluid condition? It could easily be that you're blowing through the converter. Was the converter built specifically for your combination?

Is the tranny equipped with a brake? What is the max stall speed of your converter?