BIGBADBOB

TC LOCKUP I know this is the TSB for the cold weather warm up but it also states it enables 2nd gear TC lockup on a manual downshift. Does this mean if you select 2nd it will also lock just going down the road.
I tow a trailer 2nd lock would be nice for the back roads. Also does anyone know if this can be enabled for the 98.5+ trucks.

phox_mulder

I highly doubt it.

The 47RE in stock form can't handle 2nd gear lockup, not enough line pressure and a crappy Torque Converter.

Actually surprised the 48RE can.


phox

ratsun

I was told by the trans shop I deal with, theres no lock up in 1st or 2nd in the 47re

Snoking

Well my 47RE locks up in 2nd gear!!!! Bill's the MAN! SNOKING

Mcmopar

My dad's 96 locks in second gear!!!

phox_mulder

That would be correct, for a stock 47RE.

DTT 47RE's can have 2nd lockup.

Is that a 47RE or a 47RH?
Is it stock, or has it had aftermarket magic added?



phox

Mcmopar

47RE with a little black magic dust added.

RowJ

As mentioned by Snoking, DTT's 47RE does lock up in 2nd gear. It's very impressive. For future reference to anyone considering a tranny upgrade...I came down Pikes Peak in second at 8500 lbs and believe I could have made it all the way with no brakes if it wasn't for rubber necking traffic.

RJ

bluepp

I understand that if you go with ATS class 4 rebuild you;ll get lockup in all 4 gears on the 47re