- #8 of 74
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Re: 2000 Suburban shifts hard between 3 and 4 [geiringe]
by frey3581
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Jan 20, 2008 (5:42 pm)
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Replying to: geiringe (Feb 26, 2007 7:27 am)
I am having similar problems with my 2000 / 2500 suburban. It started out with occasional hard shifts and now I get a shutter at low rpm shifts. I am wondering if you ever resolved your problem?
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- #9 of 74
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Re: Chevy Suburban Transmission Problems [70ss454_man]
by rhtrans
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Jan 20, 2008 (8:31 pm)
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Replying to: 70ss454_man (Jan 25, 2007 6:24 pm)
The first thing i would check is the fluid level. when its cold the fluid contracts making the level very low, this could be causing the filter to suck air which in turn causes the pump to airiate and make a whining noise. as the fluid heats up it expands bringing the level up allowing the filter to its job..sounds like when you turn a corner it may be falling out of gear due to low fluid level. The late 1-2 shift and won't come out of reverse...may mean a bigger problem, but i'd certainly check that first. Make sure when you check it it's warmed up good, its in park running and on level surface. If it is low, there must be a leak. add fluid...recheck, if ok repair leak and service the trans (filter & pan gasket)...not a flush
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- #10 of 74
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2001 chevy 2500hd 4x4 8.1
by jdwil5052
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Jan 23, 2008 (5:44 pm)
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not sure whats up with this one. almost at a stop it drops hard in to lower gear. not all the time..truck shifts pulls like a tank. but when slowed to stop almost a clunk sound gear change. (note) my a.b.s. lights come on. may be the prob.who knowes ANY HELP........................
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- #11 of 74
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Re: 2001 chevy 2500hd 4x4 8.1 [jdwil5052]
by rhtrans
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Jan 24, 2008 (4:58 pm)
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Replying to: jdwil5052 (Jan 23, 2008 5:44 pm)
I'm sure you have the allison transmission in your vehicle. That was a common complaint in the earlier units and not much can be done...unless a speed sensor is for the abs is causing it but not likely. It is a very heavy duty transmission & not really made for comfort..lol. I would Ask your dealer if there are any computer programming updates for this complaint.
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- #12 of 74
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Chev 2500 hd tow/haul button
by pakmule
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Feb 02, 2008 (7:31 am)
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My 2001 chev 2500 tow/haul button will not engage the transmission and the light in the dash does not come on. I have a allison transmission 8.1 engine. help me with this problem.
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- #13 of 74
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Re: Chev 2500 hd tow/haul button [pakmule]
by rhtrans
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Feb 04, 2008 (6:07 pm)
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Replying to: pakmule (Feb 02, 2008 7:31 am)
Well the tow/haul buttons purpose is to tell the computer to change the shift strategy 2 accomodate a heavy load. If the stratgy does not change when pressed then there is either something wrong with the switch, a loss of power or an open wire. hard to say exactly without a scanner and further diagnosis...sorry. Check all fuses, inside and outside..who knows , you might get lucky.
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- #14 of 74
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Re: Chev 2500 hd tow/haul button [pakmule]
by clb9er
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Feb 17, 2008 (10:09 am)
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Replying to: pakmule (Feb 02, 2008 7:31 am)
Did you have any luck? mine has the same problem
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- #15 of 74
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Re: Chev 2500 hd tow/haul button [clb9er]
by pakmule
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Feb 18, 2008 (7:56 am)
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Replying to: clb9er (Feb 17, 2008 10:09 am)
All anbody has said is to check fuses.
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- #16 of 74
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Re: Chev 2500 hd tow/haul button [pakmule]
by jsd214
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Feb 20, 2008 (1:53 pm)
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Replying to: pakmule (Feb 02, 2008 7:31 am)
The tow/haul button in the end of the shift lever has two small wires that run down the shift wire and into the steering column. After years of moving the shift lever up and down, these two small wires will break near the inside end of the shift lever. If you remove the shroud from the steering column (right behind the steering wheel) you will probably find broken wires. I have successfully soldered them back together and taped them off or you can purchase and new shift lever with the tow/haul button.
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- #17 of 74
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How can I tell if I have an Allison Transmission
by bret3
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Feb 29, 2008 (5:06 pm)
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I just bought a 2002 chevy Surburban LT with an 8.1. I'm headed out to Texas to pick it up. I currently have a chevy 2500 with a durimax and I really like how well the allison handles the loads on that truck. 180 k on that one and going strong. I'm not sure what numbers on the ein will tell me if I have an allison attached to that big 8.1
Thanks
Bret
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