I bought a TKX after deciding I would like to have over drive since I drive my car a lot. After doing some research I bought the Perfect Fit from Silver Sport. The unit with the shifter to fit the factory 4 speed hole is very nice. Their cross member is also very nice.
The initial issue I ran into was that I thought I would only have to remove the shifter hump and move it to the rear (not a big deal). Then I found I needed to trim the floor opening on the rear side for some more shifter clearance (also not a big deal). Once everything was bolted in I realized that my clutch fan is now making hard contact with the stock fan shroud. I did not have this issue with my 4 speed. I took a measurement of the engine and transmission angle and found that it was now at 6 degrees down (to the rear). Same measurement (performed prior) with the 4 speed was 3 degrees down (to the rear). From what I have found, 3 to 3.5 down is what a factory V8 G body is.
The issue is that Tremec locates the transmission mount pad up higher (closer to the main shaft). I remember going through this years ago with a Tremec 3550 and later a TKO 600. They do this for floor clearance but at the sacrifice of proper operating angles on the u joints.
So now, my issue is this lower mounting of the transmission throws off the U joint operating angle and causes my fan to hit the fan shroud because the front of the engine is now tilted higher.
I spoke to a representative at Silver Sport Transmissions technical department about my issue and they are aware of it. He said the engine should be between 1 and 4 degrees down and recommended that I shim the transmission up to correct the angle. They carry shims to install between the transmission and the transmission mount. I decided I would make my own with what I have around here. I jacked the transmission up as high as I could and slipped flat stock in there. I found that with the car level and 1.145" of spacer gets me to 4.0 degrees down. There is no more room to to raise it unless I cut the top of the tunnel off at the rear of the trans. I also have to make a spacer to raise the shifter hump to clear the shifter tower.
At 4.0 degrees down I have gained clearance in my fan shroud and I technically am within the 1 to 4 degrees range, but now I have the top of the transmission uncomfortably close to the trans tunnel.
I can't tell you how aggravated I am after spending $3600 plus for the trans and another $350 for the cross member.
The initial issue I ran into was that I thought I would only have to remove the shifter hump and move it to the rear (not a big deal). Then I found I needed to trim the floor opening on the rear side for some more shifter clearance (also not a big deal). Once everything was bolted in I realized that my clutch fan is now making hard contact with the stock fan shroud. I did not have this issue with my 4 speed. I took a measurement of the engine and transmission angle and found that it was now at 6 degrees down (to the rear). Same measurement (performed prior) with the 4 speed was 3 degrees down (to the rear). From what I have found, 3 to 3.5 down is what a factory V8 G body is.
The issue is that Tremec locates the transmission mount pad up higher (closer to the main shaft). I remember going through this years ago with a Tremec 3550 and later a TKO 600. They do this for floor clearance but at the sacrifice of proper operating angles on the u joints.
So now, my issue is this lower mounting of the transmission throws off the U joint operating angle and causes my fan to hit the fan shroud because the front of the engine is now tilted higher.
I spoke to a representative at Silver Sport Transmissions technical department about my issue and they are aware of it. He said the engine should be between 1 and 4 degrees down and recommended that I shim the transmission up to correct the angle. They carry shims to install between the transmission and the transmission mount. I decided I would make my own with what I have around here. I jacked the transmission up as high as I could and slipped flat stock in there. I found that with the car level and 1.145" of spacer gets me to 4.0 degrees down. There is no more room to to raise it unless I cut the top of the tunnel off at the rear of the trans. I also have to make a spacer to raise the shifter hump to clear the shifter tower.
At 4.0 degrees down I have gained clearance in my fan shroud and I technically am within the 1 to 4 degrees range, but now I have the top of the transmission uncomfortably close to the trans tunnel.
I can't tell you how aggravated I am after spending $3600 plus for the trans and another $350 for the cross member.
