98charlize

i just took my car out after 2 years and had some problems. i fixed a misfire but now there's another problem. when i floor it i get the drop shift but then theres no up shift unless i back off the gas. it did have a code for slipping. any ideas? do i need a new tranny? thanks.

FLT

iTrader: (1)

What was the code that you got? Also is there a reason that your car has been sitting for 2 years? Have you put a stall tc in since you last drove the car? Are you getting any other codes?

98charlize

internal slipping or something like that. i parked it because to many tickets. whats a stall tc? no other codes.

performabuilt

iTrader: (25)

Code 1870 componet slipping would that be it ?
First how do the shifts feel other wise
Have you checked the fluild level a tiny leak over two years can make a large loss of fluild

98charlize

yes that sounds right. i just flushed the tranny and the level is ok. it shifts fine under all other conditions. there is a kind of hack job done on the speed sensor. i don't know what happened there. i think it's the speed sensor.

FLT

iTrader: (1)

The speed sensor is very important and this could very well be your problem. Vince

performabuilt

iTrader: (25)

Agreed with vince the speed sensor can cause all sorts of issues and codes that could lead you in a different direction , I would definatley address that first

98charlize

great thanks guys.

performabuilt

iTrader: (25)

your welcome

98charlize

ok so i talk to the guy who reflashed the computer and he said that put a box in line with the vss but that it was working fine. i changed the vss just in case. problems is still there.any other ideas? please help! thanks guys.

Gilbert@Ace Racing

What is the purpose of the device that is inline with the VSS? A proper speed sensor signal is paramount to the proper operation of the transmission.

And since the "reflash" was performed has the computer stored any codes... if so specifically what are they?

If there have been any changes in the driveline that will affect final gear ratio those changes can and will affect WOT shift points if they are not addressed in the PCM software. Specifiaclly if the torque converter, rear axle gears or the tire size have been changed a similar condition to what you have described will occur.
g

performabuilt

iTrader: (25)

im curious about the box to or was it some sort of test device .

Gilbert@Ace Racing

Hmmm... I wonder if it has add on cruise control?

g

performabuilt

iTrader: (25)

thats and idea but i thought most of those cars came with it seems its nearly standard now

98charlize

the box either tricks the car into thinking it has stock gears or it changes the signal for the new gears. there was one code for internal slipping. but i cleared it and it has not come back. the new gears are 3.42's. the guy said that he can't reflash it because gm did not put those gears in that year car.(98 z28) the cruise control was on the car new. i do have a bent axle too. i didn't think that would matter though.

98charlize

any ideas?????

FLT

iTrader: (1)

First off I will say that I am not a tuner. However I have never heard of the box on the vss wires to trick the computer. If your tuner said that he could not tune it because of the gears I would look to contact another tuner for a second opinion. It also might be a good idea to contact HP tuners or the guy's at LS1 Edit and see what they have to say about the gear ratio info for the 98 model year.SEE SPONSORS LIST------------> I have heard of many different issues with the 98 computers and have been told by a couple different tuners that they really are a PITA!