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Unread 01-12-2015, 02:27 PM   #1
HMFIC
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Will not go over 2100rpm

1994 I6 TF999 3 speed auto

Will not go over 2100rpm in 1st gear. No problem hitting the higher rpm on the highway when down gearing from 3rd to 2nd. But if I get it going in 2nd and down gear to 1st it goes right back to 2000-2100 rpm and won't budge over that. I want to says it might be the torc converter but it doesn't do it when going from 3rd to 2nd. Any insight would be greatly appreciated!

Has new headers, cat, muffler and has good flow out of tailpipe.

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Unread 01-13-2015, 06:47 PM   #2
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Unread 01-13-2015, 10:30 PM   #3
Luuca
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Let me understand this.

When you downshift, it bogs down and drops the tach to 2100 rpm? Thus slowing the vehicle? As intended?

Does it rev over 2100 in 1st from a dead stop? Or does it shift at 2100 into 2nd?

Is the Trans COntrol Unit on the TF999 a seperate unit than the ECU? If so, have you made sure it's good? Swapped it for another unit to see if it acts the same?

I only have experience on the AW4 in XJs and those have seperate TCU behind the glove box area. I had a trans that was shifting all funky. Took a look at the TCU module, and the PO must have put some cologne or perfume in the glove box that leaked onto the TCU and corroded the connector. Once cleaned up it shifted just fine.
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Unread 01-14-2015, 10:23 AM   #4
HMFIC
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Will not go over 2100 rpm from dead stop. I am not sure if the TCU is separate or not. I was thinking it was it all was off the ECU. I will check into the TCU/ECU when I get home. Thank you!
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Unread 01-14-2015, 10:40 AM   #5
Mike Romain
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After doing work in the area I think I would be looking closely at the linkage on the throttle. Maybe the kickdown lever or something is out of whack limiting the throttle.
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Unread 01-14-2015, 11:13 AM   #6
Luuca
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Quote:
Originally Posted by Mike Romain View Post
After doing work in the area I think I would be looking closely at the linkage on the throttle. Maybe the kickdown lever or something is out of whack limiting the throttle.
I guess the question is can he get the pedal to the floor and conversely, does the butterfly respond accordingly. Good point Mike.
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05 LJ Rubicon "Ghost" 4" RE Lift, 1.25" BL, 35" Goodyear MTS, 4.10 D44 F/R Locked

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Unread 01-15-2015, 06:42 PM   #7
HMFIC
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In park/neutral it revs normal. I rev'd it close to redline here. It revs the same with pedal.




Dead stop to me standing on the skinny pedal.

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Unread 01-15-2015, 06:48 PM   #8
HMFIC
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Those are videos if you click on them. Not sure why it didn't show up that way.

The throttle linkage and cables look good.
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Unread 01-17-2015, 01:16 PM   #9
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Help
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Unread 01-17-2015, 03:33 PM   #10
Mike Romain
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Quote:
Originally Posted by HMFIC View Post
Help
Can't see your videos, does the throttle physically open all the way?
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 01-18-2015, 11:06 AM   #11
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broken video
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Unread 01-18-2015, 11:09 AM   #12
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still not wor5king it seems
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Unread 01-18-2015, 11:11 AM   #13
HMFIC
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Quote:
Originally Posted by Mike Romain View Post
Can't see your videos, does the throttle physically open all the way?

It opens up all the way in park/neutral and has no problem hitting high rpms at highway speeds
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Unread 01-18-2015, 11:13 AM   #14
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broken video again
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Unread 01-18-2015, 05:05 PM   #15
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YouTube (Short URL)
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