Help with a transmission selection.

[68EFIvert]

My engine has outgrown my T5 tranny and I am looking at replacing it before it is worthless. I have fixed most of the problems on my car but it looks like I may have a rear main seal that isn't sealing properly. I have a little oil leak coming from the bottom of the bellhousing. I really am not excited about replacing the transmission becasue they are expensive but I am also not excited about the idea of removing the tranny to fix the seal and then coming back to pull it again to put in a new transmission.

As I mentioned I have a T5 with a JMC hydraulic cluth kit. I have narrowed my choices down to two. A TKO600 or a GForce T5/Astro T5. My understanding is the TKO will bolt right into my car without modifications to the floor pan.

My dilemma is I already have the hydraulic clutch, bellhousing and crossmember for a GForce tranny so I will have less expense if I go that way. I think I may be able to get a bracket for my JMC kit that will fit a TKO transmission and if so that will greatly reduce the costs.

I have heard that the GForce transmissions are noisier than the TKO600 but do not know for sure. I am sorry to post another what tranny to buy and would like to hear some of your feedback before I jump into this project. Thanks for the help.

 

[D.Hearne]

There is no bracket to adapt a Tremec to a T5 bell. They both have the same input shaft length, so even if you did bolt an adapter to the rear of the bell to do this, the input shaft would then be too short to reach into the pilot bearing. If you want to go with a tremec, then you'll need a Tremec bell or a 79-82 SROD bell (same pattern and depth as the Tremec bell)

 

[jikelly]

I thought the large tremec TKO transmissions required modification of the early mustang transmission tunnel to fit. If that is the case then you should look into an upgraded T5. It'll be a little less weight and you wont need a new bellhousing either.

 

[68EFIvert]

There is no bracket to adapt a Tremec to a T5 bell. They both have the same input shaft length, so even if you did bolt an adapter to the rear of the bell to do this, the input shaft would then be too short to reach into the pilot bearing. If you want to go with a tremec, then you'll need a Tremec bell or a 79-82 SROD bell (same pattern and depth as the Tremec bell)

I was referring to the slave cylinder bracket not an adapter plate but thanks for clarification. 79-82 SROD bellhousing? Is that from a 79-82 Mustang?

 

[D.Hearne]

I was referring to the slave cylinder bracket not an adapter plate but thanks for clarification. 79-82 SROD bellhousing? Is that from a 79-82 Mustang?

Yea. There's also a pickup truck bell from the same years, but I think it may use the 164 tooth flywheel. That could be plus for a torqier motor. The SROD bell is basically the predecessor of the 93 Cobra's bell.

 

[mtaqua]

I went with the A5, probably be at least a year or so before it actually is mated to the motor. I couldn't find anything bad about the A5. Hopefully I won't regret it. It should be an easier swap for you, since you already are running a T5.