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Tech Q & A

Technical questions about Mopar builds, repairs, and anything else Mopar.


 My question has to do with the necessity of the use of a pinion snubber on my vehicle, a 1972 Scamp with a 360. Do I need to use it, or can I get away without the use of one? I have an 8¾˝ Sure Grip but will not be using the car at the

Hard Job

I am building a 470 stroker in a 400 low deck block for my 1969 Road Runner. I have a 440 forged crank that has been machined for this application but was never nitrited surface hardened. Is this a must do on a forged crank? Hmmm.

Speed Reader

I want to grease or lube the speedo cable on my ’87 Fifth Ave. Can you please tell me the best lube to use? I’ve heard graphite and I’ve heard white lithium but I’d like to hear it from the expert. The OEM stuff, Mopar P/N 4318078 (the

Green Around The Gills

I just had my 8¾˝ rear rebuilt. I went from a one-legger to a Cone-type Sure Grip, 3.23:1. The diff is a NOS cone Sure-Grip that I purchased many years ago. My concern is the wheel bearings. The guy who rebuilt it used Green bearings

Axed Axle

Did Chrysler ever put A 7¼-inch rear in the 1987 Grand Furys with 318 motors or were they all 8¼˝ rears? Is the yoke on that ’87 Grand Fury the same as a cop car if it is an 8¼˝ rear end? How can I tell if I have an 8¼˝ or a 9¼˝ rear end?


I have a ’68 Coronet R/T, 400, 4-speed, that I have owned for about 10 years. I try to correct as many details as I can (the car was restored, only semi-profession- ally, before I bought it). My friend Hector says I am missing the splash

Get A Handle On It

I recently bought a reproduction Slap- Stick T-handle for my ’71 Charger. The bottom has a bulge and will not fit through the sliding piece in the console top. From what I have been told, they are all like this. How can I make this work?

Out of Balance

The wire wheels on my 1935 Chrysler are constantly going out of balance. I have them balanced at the tire shop, and if I just park it for a couple of days, the wheels are out of balance the next time I drive it. The tire shop can't figure

Texas Steer

I’m putting a 1970 Coronet R/T (440-4, non-A/C) back to dead stock. One of the things the previous owner had done was to remove the power steering. Luckily, he gave me the correct (original) steering column and the gearbox. But he didn’t

Drumdance Kid

I’m attempting my second-ever ground-up restoration, this one’s on a ’72 ’Cuda 340. One thing I’d really like to do right is the rear drum (11˝) brakes. I’ve seen guys display their rear brakes at shows with the wheel and drum off, and,

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