White Shed Speed

White Shed Speed White Shed Speed Inc.
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Quick check of the shift positions on this trans build before final assembly and delivery at the shootout.
08/27/2026

Quick check of the shift positions on this trans build before final assembly and delivery at the shootout.

Got the pleasure of working on this compound turbo 1g yesterday. Shook out some bugs and got er tuned up for some shak...
08/23/2026

Got the pleasure of working on this compound turbo 1g yesterday. Shook out some bugs and got er tuned up for some shakedown passes at the shootout. Got a new leader on the dynoboard as well!

Cage guys cut the rear strut hole kinda big so they could lift the cab up to weld the top of the cage. No problem, we ...
05/19/2026

Cage guys cut the rear strut hole kinda big so they could lift the cab up to weld the top of the cage. No problem, we just made some patch pieces that rivet on so we can take them off if we need to lift the cab again.

05/10/2026

We frequently get asked about what we rate certain trans builds at, and that is not something we really do. It often puts us at odds with customers, as everyone wants a simple yes/no answer, and it is not that simple.

But to help out, I'll put it out there as simple as possible on what to expect from a Mitsubishi W5M33 transmission. This is data I've collected over 20 years of watching others, and my own results.

For ANY OEM Mitsubishi W5M33 gear set, 90, 91-92, 92+, EvoIII, ect, assuming new or gently used gears with no built up fatigue, and good cases/bearings, the lifetime due to gear tooth breakage can be summarized by:

At 250-300ft*lbs expect it to live almost forever. The gear teeth should last 100 million+ cycles, or revolutions.

At 500ft*lbs, expect it to last around 100 passes.

At 700ft*lbs, a few passes.

At 1000ft*lbs, instant failure.

There are modifiers of course. Shotpeen, cyro, ect can give you a fractional increase in life. 100 passes might turn into 125.

It can go the other way. Buy a used OG gold standard shep stage 4. PO had it in a 700ft*lbs setup for a few hits. That used up 50-75% of it's life and now it only lasts 25 passes at 500ft*lbs.

Put a 1000ft*lb clutch in the car even though your engine makes 500ft*lbs and you still hit the trans with 1000ft*lbs every launch or NLTS. Now it lasts 30 passes instead of the 100 it could have.

These guidelines go for any of these transmissions, weather it's a be**er junkyard pull, or the finest work from me or TRE or TMZ ect. At 300ft*lbs life is almost infinite, and at 1000ft*lbs it is instant failure. Extrapolate from there based on prior use, and other modifiers.

There is nothing you can do in these transmissions that would make a factory gearset live and infinite life at elevated torque numbers. You might just get a fractional increase in the number of passes it lasts before failure.

Even the all-mighty ppg dogbox lives by these rules, the torque numbers are just moved up a bunch. Probably something like 500ft*lbs is infinite life and a few passes at 1500ft*lbs, and then instant failure at 2000ft*lbs. The are strong enough us normal guys will probably never break one, but the guys chaising 7's and beyond break them regularly.

A friend of ours got accepted to the 72fast race at the UCC thingy coming up. We helped out some of the Fab projects n...
05/10/2026

A friend of ours got accepted to the 72fast race at the UCC thingy coming up. We helped out some of the Fab projects needed to get this truck finished up so we can test before the event. 5" intake pipe with a velocity stack, Hood stack exhaust, and mount the seat and harness in the 8.50 cage we helped out a bit with. We actually used a DSM kirley seat mount kit in this .and it worked out really well.

Excuse our joke pictures, we like to give this guy a hard time, but I do think the truck would be faster with the exhaust stack pointed at the windshield.

Finished up this 1G AWD transmission for a local customer who's owned his car since new! IIRC he told me it's run 11s o...
05/10/2026

Finished up this 1G AWD transmission for a local customer who's owned his car since new! IIRC he told me it's run 11s on an og fp green for like 20 years! This one got all our upgrades. Billet shift forks, rail end, brutal strong 4 spider, and our assembly tweaks. They look really good with the replated hardware.

A new thing in this trans is we started making shims, as the Mitsubishi ones are incredibly hard to get any more. We have to fine tune our manufacturing process before we are ready to sell the public.

Our friends at Dove Motorsports got us hooked up with some lubricants from Driven Racing Oil. We have 80-90 GL4 gear ...
05/05/2026

Our friends at Dove Motorsports got us hooked up with some lubricants from Driven Racing Oil. We have 80-90 GL4 gear oil in stock for local pickup.

Perfect transmission oil for us Mitsubishi guys and classic/muscle car 4 speeds.

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28066 2600 N
La Moille, IL
61330

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