is there an adapter plate or anything i can use to put a turbo 350 trans in my 89 Firebird with a 3.4?

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Sgt Panther

89 Firebird..2.8/3.4 conversion

 

Yes, I'm sure advance adapter has a "plate".
But, it's not the right solution.

Next Question, please.

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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

Why would u want a th350 behind a v6? there would be no point since the 700r4 could handle all the power the 3.4 could make. Its over kill... plus that overdrive is great on MPG.. im upgrading to a jet build 2004r as soon as i can since i do so much driving. just my 2 cents.

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[This message has been edited by Graeme'sFirebird (edited November 28, 2001).]

 

Is your current trans bad? If so, I have a 700R4 for a 2.8 sitting in my garage wanting a new home. $50 and it's all yours

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Ya can't have too many fast Chevys!

 

Even assuming you could get the Th350 to mate bellhousings with a 60 degree V6; I don't think you could find a torque convertor for it. There was a Th-250, designed to back up V6 motors, but it was for 90 degree V6's. I suppose you could have your flexplate custom-drilled to accept a Th-250 torque convertor, but the 250 TC might not slide onto the 350's input shaft...


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-Tom P (Hot rodded 1986 Firebird 2.8l)

 

gotta also remember buddy, that going with a T350 you're gonna lose that 4th gear, and cruising around at 70mph in third all the time you'll probably start wishing you had that overdrive back. atleast from a fuel standpoint. You should know that you can build a 700R4 to shift nice and firm just like a T350, well maybe not that firm, but firm enough. if you're worried about your tranny because of a 3.4L swap, go ahead and have it rebuilt, include a vette servo, shift kit of your choice, and have the shop boost the line pressure. That'll give you tire squeeling power in atleast the first two gears, if you can find yourself some more torque (i.e. mods in the motor) that could take care of third gear too. Also, remember not to buy v6 tranny mounts anymore, for i snapped 4 of them inhalf, am now running one for a TPI350 and haven't had problems yet. next up will be a vette mount. lol. and jokin. ok, c'ya dude, and good luck.

 

Thanks everyone I appreciate the advice, I have a th350 just sitting around so I was curious. My 3.4 has gone through a couple 700r4 already...but this time is just messed up the governor gears so I just replaced them..and it is running again.

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Sgt Panther

89 Firebird..2.8/3.4 conversion

 

If you did, somehow, get the TH350 to bolt up, here's the rear gears you need to cruise @ 70 around 2500-2600: 2.73. my 76 bonnie has them & gets about 20 mpg at 65 with a TH400. get that 700r-4 built up right . overdrive rules& lets you have those 3.73 and up inthe rear.