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Transmission and drivetrain related components. Discuss automatic and manual trans repairs and performance or talk about driveshafts or rear-ends and differentials. Diagnostics of 4-speed, 5-speed, or even 6-speed transmissions.

RPM fluctuating at steady throttle position 2008 Silverado

My 2008 Silverado(5,3 l 4L60E) has strange rpm fluctuations.
I can not pinpoint what causes this.

See the video for what i mean.



When i drive at a steady speed manual or on cruise control my engine rpm starts to go up and down by about 150 rpm.
It is not that it is switching between 4 and 8 cill mode.

It looks like it is the lockup switching in and out.
Does anyone ...
Read more : RPM fluctuating at steady throttle position 2008 Silverado | Views : 18 | Replies : 3


1987 Right Front Doesnt Fully Disengage in 2h

I recently bought a 1987 Chevrolet Custom Deluxe with (guessing) a 6 inch rough country lift. The previous owner had started fixing it up, new super swampers, shocks, etc but didn't do much that wasn't lift related.

I could hear some noise from the front but between the loud pipes and the big tires it was hard to pin point. It also had a bad rear u joint adding to the noise. After replacing the ...
Read more : 1987 Right Front Doesnt Fully Disengage in 2h | Views : 16 | Replies : 0


4.10 gear for 2014 Silverado V6?

any recommendations of brands of gears and shops that would install a 4.10 on a 2014 V6?
Read more : 4.10 gear for 2014 Silverado V6? | Views : 82 | Replies : 3


What year 4l60e are interchangeable?

Hey guys.. Wondering what year 4l60e is interchangable with my 2006 Silverado 1500 z71.. On all the upshifts it seems just fine. But if I lay into it a little bit then it seems to grab the gear, then slip, then grab the same gear.. And ideas?
Read more : What year 4l60e are interchangeable? | Views : 89 | Replies : 5


1991 chev z71.

Hello, I am new here and recently acquired a 1991 chev z71 1500 ext cab 350 from my neighbor for helping him roof his house. It needs a transmission however, as it has lost reverse. What model of transmission were put in this model/yr trucks? It is a 4sp automatic. Many thanks for any advice or help.
Read more : 1991 chev z71. | Views : 54 | Replies : 2


transmission wont shift rite

I have a 2004 silverado 155 z71 ... the service 4 x 4 is on the dash and now its not shifting into the upper gears rite. Its like it hits neutral and then jumps into gear ...... Were should I start?
Read more : transmission wont shift rite | Views : 88 | Replies : 2


2004 Silverado- Think Trans is gone, interchange years?

I think the tranny is gone on my 2004 z71 5.3l. I was driving down the highway when I started getting surges, pulled off and the tranny goes 1-2 fine then just surges in 3rd and goes to 4th but no overdrive. Code came up for a Shift Solenoid B stuck, cleared it and it hasn't come back. I am dropping the pan and replacing the solenoid today but I am doubtful that is the ...
Read more : 2004 Silverado- Think Trans is gone, interchange years? | Views : 57 | Replies : 1


2005 1500hd rear wheels locked up

I have a 2005 chevy 1500hd 4x4 I had just started going down the road 20-25mph and the back tires locked up. after it stopped I tried forward and reverse and 2 and 4 wheel drive all it does is rev up. when the tow truck was loading it it was in neutral and one tire was turning one direction and the other was going opposite. what happened?
Read more : 2005 1500hd rear wheels locked up | Views : 140 | Replies : 6


Vibration

Good Day All,
I have a 2006 Silverado 1500 2WD. The rear end was completely rebuilt, u-joints replaced and driveshaft carrier bearing replaced. There is a chassis vibration between 30 mph and 45 mph. The dealer put a " stethoscope" on the truck to help pin point the vibrations. The initial diagnostic was the drive shaft carrier bearing. The dealer has been chasing this issue for 3 days. is is possible that the issue is ...
Read more : Vibration | Views : 58 | Replies : 0


2007 Silverado Classic diff capacities

The manual states the type and how much to fill (front - to bottom of fill hole, rear - 5/8" to 1 5/8" below fill hole) but nothing about how much they should take.

It's 3.73 gearing with the G80 gov-lock rear end (2007 Silverado Classic, 4wd)

Thanks!
Read more : 2007 Silverado Classic diff capacities | Views : 175 | Replies : 9


 

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