86 Z28 Rear Main help
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Junior Member
Joined: Nov 2024
Posts: 15
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Car: 86 Z28
Engine: 305
86 Z28 Rear Main help
Hey y’all,
I understand the 86 Z28 305 would have a 1 piece rear main… however am I able to put a 2 piece in?
and whichever way, is pulling the engine and tranny out the best way to get access?
I understand the 86 Z28 305 would have a 1 piece rear main… however am I able to put a 2 piece in?
and whichever way, is pulling the engine and tranny out the best way to get access?
Joined: Nov 2008
Posts: 2,093
Likes: 175
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: 86 Z28 Rear Main help
If it has a 1pc then it only fits a 1pc. 2 pc is completely different. Pulling the transmission is much easier than the engine.
Joined: Apr 2000
Posts: 1,535
Likes: 322
From: South Windsor, CT
Car: '89 GTA
Engine: ZZ6TPI
Transmission: T56
Axle/Gears: Borg Warner 3.70:1
Re: 86 Z28 Rear Main help
If it is an ‘86 and the motor is original, or was replaced with an ‘86 or later motor, then it is a 1 piece rear main seal. You can’t put a 2 piece in it. Replacement will require the motor and transmission to be separated, either remove the motor or remove the transmission. Removing the transmission is easier.
Supreme Member
Joined: Jan 2004
Posts: 2,322
Likes: 100
From: So. Ohio
Car: 88 Camaro
Engine: L98 350
Transmission: 700r4
Re: 86 Z28 Rear Main help
You wouldn't want the two piece anyway. Pull transmission, torque converter, and flexplate and the seal is right there. Remove, replace.
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