trans swap
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 7
Likes: 0
From: york, pa
Car: 89 iroc
Engine: beefed 355 for now
Transmission: 700r4 for now
Axle/Gears: 3.73
trans swap
if i want to swap my 700r4 for a th350 will the hurst changeover kit be enough or will i need additional stuff to make work?
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: trans swap
you need to compare overall lengths of the 2, the TH350 was offered in 3 different overall lengths, and you may need a shorter or longer driveshaft.
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 7
Likes: 0
From: york, pa
Car: 89 iroc
Engine: beefed 355 for now
Transmission: 700r4 for now
Axle/Gears: 3.73
Re: trans swap
also how is this gonna effect my acceleration? are my 3.73 gonna be good enough? do i still need a kick down cable(they suck)
On Probation
Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: trans swap
yoke adapter? a TH350 with a 3.73:1 axle will accelerate like a 200-4R with 3.42:1 or a 700R-4 with 3.08:1, but you still get the horrible gas mileage of 3.73:1 but no overdrive and no lockup. You do have to run a kickdown cable. The TV cable from a 700R-4 will NOT work. The only way to avoid any cable from the engine to an automatic trans is to swap to a TH400, or a 4L60E or 4L80E.
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