swap my 305 tpi/auto trans, to 350/manual?
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Junior Member
Joined: Nov 2010
Posts: 55
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From: Mid-MO, Missouri
Car: 1989 Pontiac Trans Am
Engine: 5.0 TPI LB9
Transmission: 700r4
Axle/Gears: 10-bolt 2.73
swap my 305 tpi/auto trans, to 350/manual?
I have a 1989 trans am, 305 tpi, with auto trans. How hard would it be to swap for a 350 with a manual? does the body come with the mounting bracket for the clutch or will i have to make one?
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Joined: Jul 1999
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
Re: swap my 305 tpi/auto trans, to 350/manual?
Assuming you're talking about a T5, It's all a bolt-in with the exception of needing to cut your transmission tunnel and the hole in the firewall for the master cylinder. For a T56, if you get the right parts, it's mostly a bolt-in, but will require a new crossmember.
The clutch, brake & gas (or brake & gas for an auto) is all one assembly, so that's a bolt-in swap.
The clutch, brake & gas (or brake & gas for an auto) is all one assembly, so that's a bolt-in swap.
Thread Starter
Junior Member
Joined: Nov 2010
Posts: 55
Likes: 0
From: Mid-MO, Missouri
Car: 1989 Pontiac Trans Am
Engine: 5.0 TPI LB9
Transmission: 700r4
Axle/Gears: 10-bolt 2.73
Re: swap my 305 tpi/auto trans, to 350/manual?
and how would i find out if its a t5 or a t56?
Member
Joined: Feb 2007
Posts: 122
Likes: 2
From: pennsylvania, united states
Car: 1985 & 1988 trans am
Engine: 350 tpi ; 355
Transmission: 700r4 auto; converting to 6 speed
Axle/Gears: 9 bolt 3:27 posi; 2.73 open
Re: swap my 305 tpi/auto trans, to 350/manual?
t5 is a 5 speed
t56 is 6 speed
t56 is 6 speed
TGO Supporter
iTrader: (2)
Joined: Jul 1999
Posts: 13,579
Likes: 9
From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
Thread Starter
Junior Member
Joined: Nov 2010
Posts: 55
Likes: 0
From: Mid-MO, Missouri
Car: 1989 Pontiac Trans Am
Engine: 5.0 TPI LB9
Transmission: 700r4
Axle/Gears: 10-bolt 2.73
Re: swap my 305 tpi/auto trans, to 350/manual?
i have the 5 speed auto transmission in my car already. i didnt know that was how to differentiate them though, learn something new everyday!
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
5 speed automatic?
The stock automatic transmission was 4 speed, or you could say 3 speed plus overdrive.
Or, did you mean 5 speed manual? In your original post, you indicated you have an automatic transmission.
The stock automatic transmission was 4 speed, or you could say 3 speed plus overdrive.
Or, did you mean 5 speed manual? In your original post, you indicated you have an automatic transmission.
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Thread Starter
Junior Member
Joined: Nov 2010
Posts: 55
Likes: 0
From: Mid-MO, Missouri
Car: 1989 Pontiac Trans Am
Engine: 5.0 TPI LB9
Transmission: 700r4
Axle/Gears: 10-bolt 2.73
Re: swap my 305 tpi/auto trans, to 350/manual?
im confusing myself, sorry guys.
i do have the stock auto 4 spd trans in my car
and i would like to swap for a manual 5 speed
i do have the stock auto 4 spd trans in my car
and i would like to swap for a manual 5 speed
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