Q&A

Mailbag: Using a Limited-Slip Differential to Hook Up a 1985 Chevy C10 at the Strip

 
1985 Chevy C10 pickup - Wheelsforless

(Image/Wheelsforless)

Q: I am 18 years old and currently working on my first hot rod. It’s a 1985 Chevy C10 Custom Deluxe with a 350.

I know it’s not your typical hot rod, but that’s what’s special about it. The block is bored .060″ over with flat-top pistons, a Lunati .457″ lift cam, 2.02″ intake/1.60″ exhaust 64cc heads, Dynomax headers, a Holley 670 Street Avenger carb, and a K&N air filter.

I consistently run low- to mid-15s at the track, but the problem is my “one-wheel wonder peel” 10-bolt rear end.

Can you recommend a nice posi rear end?

 

A: Hey. Congratulations on building your first hot rod! That’s awesome.

Your C10’s stock rear end was designed for easy drivability and fuel economy, but it’s certainly not doing you any favors in the quarter-mile.

The two-wheel traction from a limited-slip differential will definitely work well with all of that horsepower freed up by those engine mods.

We’d suggest an Eaton Posi Performance differential.

It provides the even torque split you need to perform an effective, two-wheel burnout, and the traction necessary for lightning-quick launches.

For some truely unshakable traction, add a set of drag radials!

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One Comment

  1. Harold Lovett says:

    You chose a nice project to start with. It is a nice looking truck too. When you change the differential, you may want to replace the ring and pinion. A 355 or 373 gear is a good street and track to start with. I am doing a 86 and a 72 C 10 for my daughters and I thinking about going with a LS motor for the 86.

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