gear box aknocking

RobM

RobM

Not-quite-so-new-guy
Nov 2, 2016
44
18
Ozone Park Kid
Been noticing lately the steering little odd or loose. I found the problem, I think. If I unlock the steering wheel and go under the hood and twist the steering shaft by hand theres a knocking noise coming from the gear box. Think I'm just going to change it or is there something I'm over looking or is there an easy fix ?
 
RobM

RobM

Not-quite-so-new-guy
Nov 2, 2016
44
18
Ozone Park Kid
Thanks for the info and the knock is coming from the gear box and no where else and it's a stock gear box that I'm guessing. What's the way to tell the difference in gear boxes?
 
MC96

MC96

Master Mechanic
Dec 7, 2015
368
63
Thanks for the info and the knock is coming from the gear box and no where else and it's a stock gear box that I'm guessing. What's the way to tell the difference in gear boxes?
There were stickers on the front cover/end of them like brake boosters with two letters but most are long gone. G bodies came with 3 I believe 605 (undesireable but the pitman arm can be use for manual swaps as they both share the small output shaft) Non f41 slow ratio 700/800 series, and f41 700/800 series 12.7 ratio boxes. The f41 bars under the front of the frame would be a good indicator, but I wouldnt want a used box myself. I dont think any G bodies came with manual boxes but Ive been wrong before.

A lot of Chevelle guys seem to like the cherokee boxes, but there are a TON of aftermarket options.
 
pagrunt

pagrunt

Comic Book Super Hero
Sep 14, 2014
4,028
113
Shelocta, Pa
Speaking of Chevelles, a old buddy of mine had knocking at the steering box of his '69 & it ended up beingcaused by the rotten frame letting the box get loose.
 
H

hoffa65

Greasemonkey
Mar 11, 2019
156
43
Atlanta GA
You can adjust the slop in your gearbox. A knock is not normal so it could be shot (beyond adjustment). Verify that the knock isn't coming from something else before doing anything.
If it is a quick ratio box then I would rebuild it....

the adjustment in this video is called the over the center adjustment, it is not the proper way to remove the play in the box. the end play on the input shaft needs to be removed first and then the over the center adjustment is done with an inch pounds torque wrench.
This process in the video will quickly trash the box as stated in the video
 

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