does anyone know why gm locked out first gear via the rubber block behind the shifter on cars equipped this way but not the cars with 3.42s and 3.23s

 

I was only aware they did it on police cars, you can remove the block , Im not sue of there reasoning

 

yeah i removed the block today and wow what a difference just messing around in 1st.

i was told it was done to all a4 and 2.73 cars no idea why. i wonder why on police cars

 

Mine wasn't that away when I bought my car. I could put my car in first gear and drive it with 2.73s, my brother's old LT1 on the other had a first gear lockout.

 

good it works good I used to have a 273 car its wa fun to slam back to first at about 45 to 50 mph WOT lol

 

yeah that's what my little brother used to do when we used to roll it out
of course i had the 3.23's and he would get a nasty jump on me. they're good from a roll. it's crazy.

 

Mine is 2.73 car, no lockout.

 

I thought all LS1 cars didn't have 1st gear lockout, regardless of gears - mine wasn't and originally came with 2.73's.

 

Like I mentioned i only knew of police cars having it

 

whats the police car rpo

i wanna see if my car was one

 

RPO is B4C

 

all a4 b4c cars came with 323s and don't have the 1st gear lockout.

my factory stock 273 car did not have 1st gear lockout, either.

 

i wonder if it was just lt1's and not ls1's that were locked out

whats the highest speed that its relatively safe to drop a stock lt1 into first

 

This is an LT1 only issue. LS1s are not blocked out of 1st with 2.73s.

 

when you have this setup does you car drop it's self down to first on a 30 mph roll? it's supposed to drop down automaticall at full throttle right? cause my brothers doesn't but mine does and mine has the 3.23. is there sometihng wrong with his tranny?

 

You would know if you had a B4C. Most are black, but not all, we have lots of them here in Texas. They were a favorite of Texas DPS Troopers. They are not typically sold on lots, they go to auction, then disappear.

 

It might of been for cop cars, but not only. Last time I checked, Trans ams were not cop cars but I have 1st gear locked out (2.73s originally).

 

Same here, 1994 Trans am with first gear locked out... I guess I'll be removing that bump stop just for fun