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Rear Diff oil suggestions?

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VelodromeRacer

VelodromeRacer

Jedi Trainee
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Hay all,

I have recently purchased a 1959 Bugeye vintage racer.
I am changing out the stock rear axels and adding double bearing hubs, it has a welded 4:22 rear end right now and I have an additional 4:55 if I need it but...

What gear oil do you suggest that I run in the diff with?
Where can I find a good set of race brake shoes as well for the rear brakes?

Other than that, I am replacing the front swivels, the car has a great race prepped 948!

I'll start racing next year, testing at Putnam Park this October 5th,
Thanks,
 
Congrats and welcome to the fun!!

Regarding rear end oil, I use Valvoline 80W90 in both my race cars. I've used it with welded gears and also with a Quaiffe differential. Works good.

I do recommend you stay away from the synthetics for this application. The synthetics seem to invent ways to get out of the rear end housing. If you do try the synthetics, have some good old fashioned dinosaur oil available to replace it with.

Tim
 
Tim is right in suggesting GL4 or 5 instead of synthetic.

If you are quite Spridget rear housing conversant and have the fix on lube migrating , then you can use a synthetic as you might pick up a small amount of power.

Carbotech in Florida did make a sintered shoe for the stock drums but they no longer do. You might check w/ them however as this was last years news. 877-899-5024. Rumor on the beach is that Metal Frictions in Seattle does also.
 
I use an inexpensive 75 or 80-90 differential oil with STP mixed 3:1.

Carbotech is located in Shelby NC and makes a great lining--my Elva has drums front and rear and they will take me through a season plus.
 
Also, from what I have heard others say, run race pads on the front and stock shoes on the rear??

Does that make any sense either?
 
Well, you could probably do that, but I think you'd be changing a lot of brake shoes. Of course, that depends on what tracks you plan on running, too. Some are a lot easier on brakes than others. Mid-O is fairly easy , Blackhawk will use more brake. Waterford Hills is tough on brakes, as it's tight and twisty.
You can also go the disc brake on the rear route.
Jeff
 
"""""Speedwell has Velvetouch rear shoes, which is what I was running."""""

They are the Carbotech pieces....he MIGHT have some left. $185 a set .....ugghhh.


""""""Does that make any sense either? """"""

depends on whether you want brakes or good brakes.

If you have to use o.e. size calipers and rear drums, AND you want a maximum effort car, you want maximum pads and shoes. Most vintage clubs wont accept rear discs on a Spridget. If you have correct brake bias you WILL smoke the rear shoes if they are organic. You MIGHT consider not using the brakes...they only slow you down.


""""""""""I use an inexpensive 75 or 80-90 differential oil with STP mixed 3:1. """""""

Uhhhh.....I would use a very good quality GL rated gear lube without any additives unless you are using a clutch type posi.
 
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