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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: Monkeyman73 on September 24, 2010, 01:24:23 AM

Title: REAR END SWAP
Post by: Monkeyman73 on September 24, 2010, 01:24:23 AM

My rear diff is going out and i would like to replace it  but would like to change it with one  that has higher gears that would alow me to have better freeway speed.
What can i use with a 3 speed tranny, or also was thinking of going with the 4 speed, what can work with this set up? 

Title: Re: REAR END SWAP
Post by: Blazin on September 24, 2010, 05:44:17 AM

What are your current gears?

Title: Re: REAR END SWAP
Post by: Monkeyman73 on September 24, 2010, 08:00:25 PM

Don't know , I have a 3 speed Saginaw trans and to me it looks like the origanal rear diff. its a 1973 chevy custom.

Title: Re: REAR END SWAP
Post by: Lt.Del on September 24, 2010, 09:00:03 PM

without knowing, you may swap rear ratios with the same ratio.  ???

Title: Re: REAR END SWAP
Post by: Monkeyman73 on September 24, 2010, 10:56:37 PM

Got it ,, thanks ill investigate what diff i have.

Title: Re: REAR END SWAP
Post by: Blazin on September 25, 2010, 07:41:02 AM

If the tag is still there it should be on it. If not pop the cover off and count the teeth on the ring and the pinion.

Title: Re: REAR END SWAP
Post by: Monkeyman73 on September 27, 2010, 02:52:15 AM

will do thanks