TCI Streetfighter 200 4R

[wayner]

Hi All, Newbie here!
I purchased and installed a TCI Streetfighter 200 4R #381500. This trans is supposed to have BRF calibrations. I am not sure what that means. I am very happy with this trans. except with the late 3 - 4 shift. All other shifts are great and firm.
I have adjusted the TV cable and have found that if I loosen it the 1-2 and 2-3 shift get closer together and softer, but there is no change in the 3-4 shiftpoint. If I tighten the Tv cable all the shifts spread out even more and get even firmer and again the 3-4 shift is even later. My 3-4 shift is at approx. 55 mph. now. I would like to lower just my 3-4 shift point and nothing else. I am running 3.31/1 rear gears if it matters. I am also running Mobil 1 synthetic trans fluid and a 2800 stall converter. So far (240miles) I think this is 1 great trans, love the 4th gear and lockup.

All my contact at TCI would say is to purchase a governor caibration kit, which I think will affect all shiftpoints, I am only interested in lowering the 3-4 shift point to around 45mph if possible.
The TCI dealer I purchased the trans through won't even answer my emails.
Any help will apreceiated!!

 

[ITSAV6]

tci

We have a tci man here on the board. Goes by meanbuicks I think. What rpm is tranny shifting at @ full throttle? BRF calibration should be around 5000 approx. What size tire are u running? My stock tranny shifted into od at 42 at lightest throttle.
Sorry you haven't got a better reply but the board has been dead as of late.

 

[wayner]

Thank you! My WOT shiftpoints are at 5100 rpm. I am very happy with that. Its just the part throttle 3-4 shift that doesn't happen soon enough, right now at 55 mph. My tires are 26.5" tall. I have tried to force a shift earlier then 55 mph by bliping the throttle, but nothing happens till 55 mph.
I sure would like that to be closer to 45mph. All other WOT shiftpoints and part throttle shiftpoints are perfect. I just want an earlier part throttle 3 -4 shift!

I forgot to mention that once the trans shifts into 4th gear at 55 mph, I have no problem coming down to 45 mph and keeping it in 4th gear with the TC locked. But if I push the throttle down, it unlocks the TC and downshifts to 3rd., which it is supposed to do from what I understand.

 

[ITSAV6]

chart

1st: 2.74 2nd: 1.57 3rd: 1 4th: 0.67

Tire Diameter 1: 26.5 inches
Rear Gear Ratio 1: 3.31:1
MPH
RPM 1st 2nd 3rd 4th
1000 8 15 23 34
1500 13 22 34 51
2000 17 29 46 68
2500 21 36 57 85
3000 25 44 69 102
3500 29 51 80 119
4000 33 58 91 137
4500 38 66 103 154

Here is a chart that will help a little. Could your speedo be off? If it shifted into OD @ 46mph it would drop to about 1400rpm.

 

[wayner]

Again thank you. I am going to print that chart, you hit it dead on, when the trans shifts into 4th gear at 55 mph and and I lock the TC, then bring it down to 45-46 mph. my rpms are at roughly 1400 rpm. Perhaps the BRF calibration of the valve body/governor likes 3.73/1 better then my 3.31/1 rear gears. And yes my speedo could be off ,but not more then about 3mph max.

 

[ITSAV6]

brf

The brf is calibrated for 3.42 gears. I got the chart from
www.smokemup.com Lots of useful calculators there.
If all the other shifts are ok I would leave well enough alone

 

[wayner]

Thank you!

Again thank you! I may leave it alone. Thanks for that link as well.
In doing a search on this in this forum, I have found people with similar late part throttle 3-4 shifts. The recomendation was to cut 2 coils off the 3-4 shiftvalve spring or put in a spring with less tension. I am not sure I want to do that yet. I will be doing a complete fluid change as per TCI's recomendation at the 500 mile mark and will change the disposable inline trans fluid filter I have when I put the new fluid in. I may attempt to change or modify that spring then.
Another local guy also said to leave it alone and that the 3-4 shift point may come down a bit once the 3-4 shiftvalve spring has had some exercise!!!!

 

[system1]

WHAT DID THE TCI TRANS COST YOU AND DID IT COME WITH THE CONVERTER

 

[wayner]

I got my TCI trans through a TCI dealer in Iowa that I met at a different message board. I got it for a couple hundred less then they show in the Summit catalog. I then payed an extra $145 to ship it from Mississippi to Winnipeg Canada (no duty)! I bought the converter seperately.

So far I am very happy with this trans, although I would like the part throttle 3-4 shiftpoint to be a little lower.

 

[system1]

THANKS FOR THE INFO. WHAT MODS HAVE YOU DONE TO YOUR CAR. I AM JUST WONDERING IF THAT TRANNY WILL HOLD UP WITH MINE

 

[wayner]

Well TCI states this transmission is rated to hold 450Hp. When I asked them what torque it would hold, i got no answer. This trans is in my 70 camaro with a 461BBC, it has 9.5/1 compression, 280/290 hyd. flat tappet cam, Performer RPM intake, headers and modified HEI estimated to be around 425 Hp and about 480-500 ft.lbs. torque.
Now I have to mention, I DO NOT RACE! This car is a street cruiser, although I do get it on once in awhile. I do not run slicks or even drag radials. Just my 295/50/15 rear street tires.

 

[system1]

THANKS FOR ALL THE INFO

 

[wayner]

HELP!

Anyone have any other ideas?

 

[ITSAV6]

here he is

This is the TCI man himself.
http://www.turbobuick.com/forums/member.php?s=&action=getinfo&userid=290

 

[wayner]

Still would like input??

TTT

 

[wayner]

Try again!

Thought I would bring this up again. I have corrected my speedo, it was off by approx 3 mph.
But my part throttle 3-4 shift is still at 52 mph. My feeling is its still a little high, I haven't done anything to try and change it yet. I was wondering if thats where it should be with my 3.31/1 rear gears??
Anybody have any ideas??

 

[ITSAV6]

1

I think that would be right on the money!