what type of gear oil to use?

[70plumchallenger]

Any recommendations on the the gear oil to use for a 8 3/4 rear axle on a 70 Challenger? Also, I heard that Redline MTL is good to use in A833 transmission...any input is greatly appreciated..thanks

[4 speed fish]

I use 80-90 wt for the tranny.Same thing for the rear end if it is not a posi.I used redline once Imo there was no difference between that and the 80-90 weight for the tranny.

[70plumchallenger]

Thanks for the info!

[dodj]

I use Amzoil Severe gear synthetic. If that pic is your car, you have an awesome Challenger 70plum! 

[BIGSHCLUNK]

I've been using royal purp. Great shot of your car!!

[Chryco Psycho]

I have be cautioned from using syn gear oils in the diff although I personally have not had problems , I use 80/90 for the diff with a friction modifier fo rthe sure grip & 80/90 or Redline MTL for the trans , MTL is lighter & should yeild slightly better milage

[BS CUDA]

 I work in a specialty gear shop - with limited slips we only use 80w90 with a friction modifier. We do not have lube failures or premature disc or cone failures. Most aftermarket limited slips also say NO synthetic oils.

[wally426ci]

Bookmark for my 4 speed truck and all my rears.   

[70plumchallenger]

Thanks for the recommendations. I will go with 80w90 with friction modifier for the diff, and Redline MTL for the trans....thanks for the comments on my ride. just got it last July and having a blast! 

[Chryco Psycho]

Great looking car , Glad you are having fun with it