s13vette

iTrader: (1)

Hi guys well i just recently performed a full rebuild on my trans. I was driving today 4 days after rebuild... and i noticed i have 4 gears THAN!!! i hit over drive.. so its like this 1st-2nd-3rd-4th- Overdrive (lock UP). I will take a vid on the way to work tomorrow morning cause this is making me. If there is something i should know please don't be afraid to shine in. Thanks

DietCoke

iTrader: (18)

No. 1-2-3-overdrive-lockup.

Lockup is not a gear. Overdrive is the gear ratio being lower then 1:1. You can program whenever you choose lockup to kick in

s13vette

iTrader: (1)

wait so what iam feeling after the 4th gear is the lock up and drops RPMS big time like 500rpms maybe more depending on my cruising speed<>>>

1-2-3-4 than (kinda of anther gear) is LOCK UP??? it never had this before lol

Bo185

Yeap 500 RPMs = lockup You converter is now not slipping hence the RPM drop.

s13vette

iTrader: (1)

i never felt all 4 gears and then lock up before rebuild

i had a stock EVERYTHING including stall and it was

1-2-3-Lockup or over drive lol never 1-2-3-4-lock up

kool thanks i thought some how god dropped his wisdom on my transmission and added another gear lol

forcd ind

iTrader: (7)

if you went from a low stall to hi stall, you will really notice it when going into lockup-some cars are programed to also lock in 3rd

01ssreda4

iTrader: (96)

Lockup feel can be changed through computer tuning, specifically altering the PWM table. Pulse width modulation is basically the computer telling the converter to not lock 100%. It pulses the lock signal to force the clutch to slip on purpose. The purpose for this is to soften the engagement of lock-up. It's for comfort for the average buyer. With kits like the trans-go HD2 or computer tuning, you can force the computer to either command 0 or 100% but nowhere in-between. This gives a solid, firm feel to the clutch engagement and makes it much more noticeable like what you are feeling.

ArkBird96

Yes, under normal circumstances the computer will allow the converter clutch to slip on in OD or when the shifter is in D3, but a lot of people tune out this "slip" either with a shift kit, or a Sonnax kit, or with tuning in the computer.

My old 3800 V6 Firebird A4 had the dreaded P1870 code and the converter wouldn't lock. When the tranny shop rebuilt it, they deleted the slip function and it really did feel like another gear. Also, what SHOULD have been done in my situation was to raise the lockup RPM to prevent converter clutch chatter at low RPMs.

s13vette

iTrader: (1)

thanks guys i have learned a good deal on this now to tunning my ls1 s13 hoping on good numbers this weekend.

joecar

You can verify that it is TCC lockup like this:

watch the rpm as you ride/un-ride the brake pedal while keeping the throttle constant, you will see rpm jump up (ride) and then back down (un-ride).

s13vette

iTrader: (1)

Well i used My launch scanner and i see it look up....

3.8blackmaro

I know my goes 1-2-3-lock-4th.