2.8 to 305HO swap
Thread Starter
Junior Member
Joined: Apr 2001
Posts: 18
Likes: 0
From: Kalamazoo, MI, USA
2.8 to 305HO swap
I am swapping my 88 2.8v-6 for a 305HO, I know that I wont have the power of a 350 but I'm not looking for that much. I had my 2.8 tranny rebuilt last year and heard that it is possible to bolt the 2.8 tranny to a 305 engine. If anyone knows anymore about this or if any mods need to be done please let me know. Thanks.
I just swapped a 3.1 v6 for a 350 in my
91 RS. V6 Automatic transmission bell housing are different from V8 bell housing so it won't bolt up. If you do swap you'll have to get a V8 automatic tranny and drive shaft, the splines are different on the V6 tranny (assuming it's an automatic).
If you have a 5-speed standard
I believe it will bolt up.
91 RS. V6 Automatic transmission bell housing are different from V8 bell housing so it won't bolt up. If you do swap you'll have to get a V8 automatic tranny and drive shaft, the splines are different on the V6 tranny (assuming it's an automatic).
If you have a 5-speed standard
I believe it will bolt up.
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
The splines -are- different on the DS? I had heard they were the same; v6 vs v8.
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
Member
Joined: Jan 2000
Posts: 144
Likes: 0
From: Tata N.S. Canada
go to my web page to swap info
the link is in the signature
------------------
C man
-----------------------
motor was a 2.8L v6 now it is
a 305 H.O. with
a th400 trany.
chrisblaster.homestead.com
my car pagewwwhomesteadcomcman.homestead.com/car.html
the link is in the signature
------------------
C man
-----------------------
motor was a 2.8L v6 now it is
a 305 H.O. with
a th400 trany.
chrisblaster.homestead.com
my car pagewwwhomesteadcomcman.homestead.com/car.html
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
The driveshafts are the same between V6 TH700 and V8 TH700.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny.
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny.
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