T-56 in 69 GTO. - Page 2 - Pontiac GTO Forum
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post #11 of 49 (permalink) Old 11-10-2012, 10:13 PM
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I say go for a Muncie and a conservative gear and let that Pontiac torque do the work or...... Tremek TKO or maybe a Doug Nash.



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post #12 of 49 (permalink) Old 11-11-2012, 05:42 AM Thread Starter
 
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Thanks for the information.

Another option is a RS500 from Keisler. The complete kit cost $2800. It has a 3.37 first gear so I can run a 3.08 rear end that will have the "off the line" performance of a 4.11 with a .68 final gear ratio.

I'm leaning that way, but if I could get better performance and save money with a T56, I would like to know.

Joe

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post #13 of 49 (permalink) Old 11-11-2012, 01:42 PM
 
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I say go for a Muncie and a conservative gear and let that Pontiac torque do the work or...... Tremek TKO or maybe a Doug Nash.
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post #14 of 49 (permalink) Old 11-11-2012, 02:34 PM Thread Starter
 
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That is a cheaper option. Right now I have a M-20 with a 10 bolt 3.55 rear end powered by a 455 bored 30.over. I'm wanting to change to a 12 bolt 3.08.

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post #15 of 49 (permalink) Old 11-11-2012, 07:23 PM
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T-56 wieghs about 100 lbs more than a Muncie or Tremec.

I never understood the need for 2 overdrives myself.



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post #16 of 49 (permalink) Old 11-14-2012, 01:23 PM
 
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my 69 has a T-56 attached to a '74 455 out of a trans am. runs great, very high torque, but I cant get the speedometer to work. . .
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post #17 of 49 (permalink) Old 11-14-2012, 01:35 PM
 
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T-56 wieghs about 100 lbs more than a Muncie or Tremec.

I never understood the need for 2 overdrives myself.
seriously?

It's all about dropping the RPMs a highway cruising speed, improving MPG and allowing more powerful cars to be produced in an era of mandated MPG goals.

I have a friend that owns a LS1 camaro that gives him 5000 RWHP, and he gets close to 30MPG on the highway
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post #18 of 49 (permalink) Old 11-15-2012, 05:35 AM
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Wow. 5000 hp and 30 MPG, what a wonderful world we live in.



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post #19 of 49 (permalink) Old 11-15-2012, 08:30 AM
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Wow. 5000 hp and 30 MPG, what a wonderful world we live in.
Well, you know what they say...
"Better living through chemistry...

I bet this guy was heavily involved in that LS1...

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post #20 of 49 (permalink) Old 11-15-2012, 09:57 AM
 
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Well, you know what they say...
"Better living through chemistry...

I bet this guy was heavily involved in that LS1...
Master builder

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Lol
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