Trans not reading gear.
Trans not reading gear.
Last edited by musky mike; 01-06-2024 at 03:19 PM.
Yes. Just last month on a friends car. Shifting early.
It was a bad TPS.
Slippage is another issue that has more to do w flow.
Darn it.
Well the other culprits in order of ease of fix are low fluid, maladjusted bands, debris in tranny line or filter, sensor issues (which you seem to have addressed and I say "seem" because I recall wnen I had to replace 2 governor pressure sensors until I got one that worked), worn or maladjusted tranny gears or a bad TC.
Shifting early. What gear / RPM and how much pressure was on the throttle? Does is shift fine at full throttle? How or is the truck tuned?
12.10@106@Famoso Raceway
Can you feel any difference adjusting the TV cable one way or the other?
I have found that the line pressure, via the TV cable adjustment, or TV spring in the valve body, can make the trans shift differently. Usually if the line pressure is too high for the computer to manage, it can shift erratically, or not at all. When my line pressure was too high, it wouldn’t shift into a higher gear, and just overrevved. At first, I thought the trans was slipping, but it was just overrevving without shifting. What confuses me is that you say it is shifting early, which can be lower line pressure.
If it was doing that before installing the Martin Saine valve body, I would remove that valve body, and reinstall the stock valve body. Then if it is still doing it, have the trans shop trouble shoot it. If the Martin Saine valve body is still in the trans when you take it to the trans shop, they will likely blame the problem on the performance valve body.
[QUOTE=98Dak408;537009]Can you feel any difference adjusting the TV cable one way or the other?
Changed sensor, all good.
Last edited by musky mike; 01-06-2024 at 03:21 PM.
Can you post some pictures of your cable set up on the trans. There was a guy last year that was having issues and ended up had the TV and shifter cables installed wrong.
Mike Williams
#001
98 DA RC GrapeJuice
99 BLK CC (Buy Back)
00 BLK RC ProCharged -Hotchkis - on and on (Sold)
01 AF CC (Leased - Turned in)
Changed sensor, all good.
Last edited by musky mike; 01-06-2024 at 03:22 PM.
I believe this is the torque converter drain back valve. If you remove it, let the truck idle for about 15-20 seconds to allow the tc to fill back up.
If your tc is not getting sufficient oil because of a debris blockage at this valve, it will act like what you are getting.
This is a good transmission troubleshooting guide. Hope you get it figured out Mike.
https://atracom.blob.core.windows.ne...out%2040%20MPH.
Project Maverick. I feel the need, the need for speed
When a trans. actually slips it's damaged, these transmissions are computer controlled, your tuner should be able to adj. the RPM's the trans shifts at when in 2nd. gear,, if you have an SCT or BG tune. What i found with mine..
Didn't you get one of Martin's valve bodies? Have you talked to him about the issue?
Having my own weird shifting issues. Always wants to idle high and not down shift. Been doing this since I got the truck. Different throttle bodies, sensors, TV cable. Want to idle around 12 to 1400 rpm. So if I'm going down the road it will want to keep going 35 to 40 mph when I let the foot off the gas. Goosing the throttle will sometime bring it down. When I stop at a light it will idle down to 700rpm. Almost think this is in the tune. Drivable, but annoying.
Mike Williams
#001
98 DA RC GrapeJuice
99 BLK CC (Buy Back)
00 BLK RC ProCharged -Hotchkis - on and on (Sold)
01 AF CC (Leased - Turned in)
Sounds like you need to adjust your IAC counts.Having my own weird shifting issues. Always wants to idle high and not down shift. Been doing this since I got the truck. Different throttle bodies, sensors, TV cable. Want to idle around 12 to 1400 rpm. So if I'm going down the road it will want to keep going 35 to 40 mph when I let the foot off the gas. Goosing the throttle will sometime bring it down. When I stop at a light it will idle down to 700rpm. Almost think this is in the tune. Drivable, but annoying.
Yes, easier said than done. I had all those erratic idles, hanging idle, etc. I kept at it until I finally got it. Every time I changed throttle bodies I had to go through it again. I had the easiest time with the dual throttle body tunnel ram set up. With two throttle bodies passing air between the bore and blades at idle, the IAC motor didn't have to swing so far open or closed while trying to control the idle.Done that a few times, seems like it takes a little bit of fine tuning even after following the procedure.
Update:
Changed sensor and trans line, all good.
Last edited by musky mike; 01-06-2024 at 03:25 PM.