TH400 speedo gears ???????

[yullose]

Just made the conversion to a TH400, and now realized how important it is that the speedo functions. I personally don't ever look at the speedo, but apparently the ECM needs to know how fast the car is going.

Any clue what speedo gears I need in the tranny ???

275/60-15 tires
3.42 gears

Thanks in advance !

 

[MeanBuicks]

Here you go...

http://www.tciauto.com/tech_info/speedo_gears.htm

 

[PaCemkr86]

is it reading at all? my th400 reads about 10 mph fast

 

[8AV8]

Ck Perf

Call Chris @ CKperformance. I have a TH350 and he hooked me up. Great service and prompt delivery.

chris

 

[yullose]

is it reading at all? my th400 reads about 10 mph fast

Nah... I had the tranny built without the speedo parts. Currently there's just a freezeplug in the transmission case where the speedo gears go.

A buddy of mine has a bunch of trannys in his garage... maybe I can talk him in to popping the tailshaft housing off one of his 400's.