LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LS to firewall clearence th400 trans??

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Old 04-28-2010, 10:45 PM
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LS to firewall clearence th400 trans??

Okay i just got my engine in and i bought motor moutn adapters and had to cut the mounts off the K-member and wels solid mounts in.

Anyways I had to set the engine back 1 inch from the factory (according the the swap plates) Just so it would mount up with the TH400.

Basically once I got the mounts welded in I have about 1/2 inch clearence on the driver side head.

Is this normal when using a TH400 or 700r4 in the stock location?

I didnt wanna have to get another driveshaft made since my was basically new and i have already shortened it and have 600 into it.


Here is a pic of the clearence.

Jay
For anyone wonder....gonna be a forged 370ci with a single T6 turbo




Old 04-29-2010, 08:12 AM
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Re: LS to firewall clearence th400 trans??

Yes its tighter to the firewall than a SBC. For that reason I recommend installing the harness before putting it in the car or atleast the trans and rear cyl head ground wiring
Old 04-29-2010, 09:00 AM
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Car: 1987 Z28
Engine: 2005 5.3L, LS6 Cam
Transmission: T56
Axle/Gears: DTS 9" 3.50 TrueTrac
Re: LS to firewall clearence th400 trans??

Originally Posted by Pocket
Yes its tighter to the firewall than a SBC. For that reason I recommend installing the harness before putting it in the car or atleast the trans and rear cyl head ground wiring
okay I just wanted to make sure, i got it all in place and was like well it can go forward bc the trans is bolted in place from where the LT1 was...then i sttarted freaking out bc its so damn close!

Thanks

Jay
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