70 TA w/400 pontiac / 6 spd???
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Joined: Apr 1999
Posts: 16
From: Berkeley, CA, USA
70 TA w/400 pontiac / 6 spd???
I have a pontiac 400 in my 70 bird...i am very tired of the 400 AT @ freeway speeds...imagine dentist drill on high for long periods of time...i dont want to change gear ratios...3:08's...is there anyway to mount up a 6 speed or a 700r4 tranny? if so, how??? thanks for any info...
Registered User
Joined: Sep 2001
Posts: 113
From: CT
I know that 200-4r's can fit pontiac engines with little to no modification if you already have an automatic. You need a new shifter, and I think you can keep the driveshaft.......
http://transmissioncenter.net/200-4R.htm
Try this site......
http://transmissioncenter.net/200-4R.htm
Try this site......
Registered User
Joined: Sep 1999
Posts: 220
From: Ewing, NJ
teh 200 4r is about half an inch shorter at teh output that a th400. teh mounting length is almost exactly teh same, you may have to oval out the tranny mount hole in teh cross member slightly to get a perfect fit.
it will help you away from a stock with a slightly steeper first gear and on the highway with a 33% drop in rpm's when you hit 4th gear.
200 4r gears: 1st= 2.74, 2nd = 1.57, 3rd= 1.00, 4th = .67
they are most commonly found in g-bodies and full sizes wioth the optional oiverdrive tranny. if you see a olds 442 being parted out, that shoudl ahve the correct tranny for you.
also, look under chevy's too. some 200 4r's are supposed to have come wiht a dual bolt pattern bell housing, although i have never actually seen one.
if you wanna go with a 700r4, they have a real nice deep first gear that will really get you out of the hole, but the 1 to 2 shift kinda hurts with a 45% drop in rpms. the 700r4 also have less of an overdrive by a little, only a 30% when you go into 4th.
to find the correct bolt pattern just look under any wrecked 6cyl 3rd gen f-body. i know the thought of a V6 tranny scares soem people, but gm used teh same components as the V8 models, teh bell housing for the 2.8 and 3.1 motors is teh B-O-P pattern, so it woudl match up corrrectly. the 700 presents soem install issues since it is about 2inches longer at the output than a th400 and i believe the mounting length is far off too.
both can be built to handle big hp, so there is no worry there. to me the 200 4r seems liek a much easier install, and if you wanna beef it up just go to the turbo buick sites, those guys go fast on them.
hope this helps.
later
tim
it will help you away from a stock with a slightly steeper first gear and on the highway with a 33% drop in rpm's when you hit 4th gear.
200 4r gears: 1st= 2.74, 2nd = 1.57, 3rd= 1.00, 4th = .67
they are most commonly found in g-bodies and full sizes wioth the optional oiverdrive tranny. if you see a olds 442 being parted out, that shoudl ahve the correct tranny for you.
also, look under chevy's too. some 200 4r's are supposed to have come wiht a dual bolt pattern bell housing, although i have never actually seen one.
if you wanna go with a 700r4, they have a real nice deep first gear that will really get you out of the hole, but the 1 to 2 shift kinda hurts with a 45% drop in rpms. the 700r4 also have less of an overdrive by a little, only a 30% when you go into 4th.
to find the correct bolt pattern just look under any wrecked 6cyl 3rd gen f-body. i know the thought of a V6 tranny scares soem people, but gm used teh same components as the V8 models, teh bell housing for the 2.8 and 3.1 motors is teh B-O-P pattern, so it woudl match up corrrectly. the 700 presents soem install issues since it is about 2inches longer at the output than a th400 and i believe the mounting length is far off too.
both can be built to handle big hp, so there is no worry there. to me the 200 4r seems liek a much easier install, and if you wanna beef it up just go to the turbo buick sites, those guys go fast on them.
hope this helps.
later
tim
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