I got an aftermarket short throw shifter for the truck and today I stumbeld upon a bulletin claimed to be from Tremec on a Mustang forum. I've emailed Tremec to confirm the authenticity and it is a genuine bulletin issued by Tremec. Something to think about when you're putting an aftermarket shifter on your Tremec transmission. It sounds like a problem will arise only if the stop bolts are adjusted incorrectly or become loose and limit the shifter travel but it also makes me wonder why the aftermarket shifter manufacturers would spend the additional money to incorporate unnecessary stops. The people who design the shifters aren't dummies, either.

NOTE:From Tremec dated 03/01Tremec Transmissions
Service Bulletin 03.01

Subject:
After market Shifter Stops

Transmission Models Affected:
All
Severe damage may be caused by installing an after market shifter with "shift stops" on any TREMEC transmission. All TREMEC transmissions are designed and manufactured with built-in shift stops to prevent over shifting. Therefore; shift stops on after market shifters are totally unnecessary when used on a TREMEC transmission. TREMEC "TR series" transmissions have multiple shift rails with shift stops on the gearing. TREMEC "T series" transmissions have a single shift rail system with stops built into the guide plate.

When installing an after market shifter on a TREMEC transmission it is best to remove the shift stops to avoid miss adjustment, and the potential of the screws vibrating lose. A misadjusted shift stop can cause an under-shift, which may lead to a gear jump-out situation. If the transmission jumps out of gear, the shift fork can be bent causing permanent damage to the transmission. Shift forks can also be damaged by "clash shifting". A clash is caused by a missed shift.

Neither an "under-shift", nor a "clash shift" can be prevented by shift stops. TREMEC shift forks are designed to take loads up to 1,000 lbs. However, a gear jump-out may well exceed 1,000 lbs. of force, which may result in a permanently damaged transmission.


Lawrenceville, GA

The T56 is much different than a T5 but if it is a Tremec, regardless of the model, it definitely has stops.

You bring up an interesting point. The Borg Warner T5 became the Tremec T5 so does that mean that the BW has stops? I asked specifically about the Tremec T5 in my email and they said it does have stops, all Tremec transmissions have stops. The one in my Truck is a Tremec. I'll ask about the BW.


Lawrenceville, GA

Charlie;

I was just wondering if you knew when Tremec bought out Borg Warner. I know that John Mummert recommends using the 86-93 T-5 for the conversion with the adapter plate. I plan on putting another T-5 behind this blower motor and there is a guy up here that does high end Mustang restorations who told me that there is a place called D&D Performance Transmission in Michigan that sells the shorter 10 spline imput shaft that can be used on later World Class T-5's (94-95). I checked out their website but haven't contacted them yet. Just another potential option.

Rono

  Ron Lane,  Meridian, ID