okay i was googling capcity for my 833 4 speed and some one said to run atf. In them is this a good idea or should i just get 80-90.I know in the new fwd drive stuff they use atf my 4 speed is a 71 23 spline is correct capcity 4 qarts thanks.

This has been a hot topic in the past. We use 90w gear oil.

90wt. Gotta agree.

I currently am using Passon Perf lube for my 18 spline. It is red like ATF. I might switch back to the old Stalube 85-90 GL-4 gear oil.

And some of us who tried both prefer synthetics even though the 833 gurus recommend against it.

We used 90W in my Cuda

GL4 ONLY. I talked to valvoline tech support and they stated that GL5 eats yellow metal and should not be uses in mopar A833.
they suggested synchromesh.

90 wt....end of story

I heard Gl-5 does not go good with the Syncro Rings. I get 85-90 GL4 and 80-90 GL5 mixed up all the time. I think 80-90 GL5 is for the rear diff. Had to edit my previos post.

syncromesh fluid. best working fluid i have found.

Most like the Passon, redline MTF, or synchromesh fluids. You can run ATF if you drive in cold weather I wouldn't use it in warm weather.

90W in my 65 4 speed.It had syncros put in it in 69 and thats it.It came with gear oil so thats what it runs.Rocky

I use Passion's oil in mine and it does not shift well. I'm going to switch to the 90 weight next time

My trans guy used 30 weight motor oil in my hemi 4 speed. It shifts fine for me.

My vote is for Jamie Passon's elixr. Call him up!! I tried Pennzoil Synchromesh and soon regretted it.

I was out rowin 4 Monday morning and loving every minute of it!

What's different about the syncros in an 833 from those in a T-56?

Tremec told me to run ATF3 in my T-56

Isn't the factory service manual the authority on this? Here is what the FSM says for 4-speed transmissions:

"During cold weather, if shift effort becomes extremely high, transmission should be drained and refilled with Multi-Purpose Gear Lubricant SAE 80 or SAE 90, as defined by MIL-L-2105B or with automatic transmission fluid types labeled "Dexron Automatic Transmission Fluid or Chrysler Automatic Transmission Fluid AQ-ATF-2848A" available under Part Number 1843314. Automatic transmission Fluid should be replaced with Multi-Purpose Gear Lubricant SAE 140 in warm weather. NO OTHER LUBRICANTS SHOULD BE USED."

SAE Gear Oil 140 IS NOT EQUIVALENT in viscosity to SAE Engine Oil 140.

But SAE Gear Oil 90 IS EQUIVALENT in viscosity to SAE Engine Oil 50 according to this chart:

I've tried both. The old 833 shifted better with ATF but leaked a little.