4l60e over drive issue???

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03-24-2007, 01:35 AM
94burban

Just installed the transmission and now I'm taking it out for a test drive.

This is in a 94 Suburban. I noticed that the rpm's would not drop much once I get going. Example, while driving on i75 at around 65 mph the rpm's were around 2300 to 2400 rpm. When I apply the brakes slightly the rpm's would go increase about 200. Tires size is 265/70/17(i believe) with a 3.42 rear, not sure if this helps.

I did install a transgo hd2 shift kit, not sure if I missed a step. I'm planning on dropping the pan and remove the valvebody. Maybe the valvebody gasket shifted on me when putting it back together. BTW, with the shift kit installed, I thought it would shift faster and a little firmer. At this time, it seems close to stock.

What do you thing I should check out.

Thanks
03-26-2007, 12:33 PM
txarkitekt

<div class='quotetop'>QUOTE(94burban @ Mar 24 2007, 12:35 AM) [snapback]87167[/snapback]</div>

Quote:

Just installed the transmission and now I'm taking it out for a test drive.

This is in a 94 Suburban. I noticed that the rpm's would not drop much once I get going. Example, while driving on i75 at around 65 mph the rpm's were around 2300 to 2400 rpm. When I apply the brakes slightly the rpm's would go increase about 200. Tires size is 265/70/17(i believe) with a 3.42 rear, not sure if this helps.

I did install a transgo hd2 shift kit, not sure if I missed a step. I'm planning on dropping the pan and remove the valvebody. Maybe the valvebody gasket shifted on me when putting it back together. BTW, with the shift kit installed, I thought it would shift faster and a little firmer. At this time, it seems close to stock.

What do you thing I should check out.

Thanks
[/b]

Yeah, with a 3.42 and 265/70/17's, you should not be at 2400 at 65 mph. Do you even feel it shift into 4th (OD)? If not, drop the pan and re-inspect everything. Re-read the instructions to see if you missed a step like you were talking about.

It sounds like it isn't even shifting into OD...
03-26-2007, 11:23 PM
94burban

<div class='quotetop'>QUOTE(txarkitekt @ Mar 26 2007, 12:33 PM) [snapback]87324[/snapback]</div>

Quote:

Yeah, with a 3.42 and 265/70/17's, you should not be at 2400 at 65 mph. Do you even feel it shift into 4th (OD)? If not, drop the pan and re-inspect everything. Re-read the instructions to see if you missed a step like you were talking about.

It sounds like it isn't even shifting into OD...
[/b]

My problem was within the valve body, I installed the 3-4 relay valve into the body the wrong way.

Found someone with this same issue on the LS1Tech forum..

Thanks...
04-03-2007, 10:41 PM
carfreak07

Your rpm,s are going to jump some when you touch thr brake....this is unlocking your converter...so that part is functioning right. Now about the rpm's, I have a 275/60/17 and at 63mph I am taching around 1500 in od with 3.42 gears....I dont think you said how fast you were going so maybe you can compare to that....hope this helped

Jarrod