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09-23-2005, 08:03 PM | #1 | |
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Transmission Problems: Common Issues and Solutions
This thread will be an overview of some of the more common transmission issues. While there are lots of things that can and will happen, I will only discuss the 4 main ones…….yeah I know that the thumbs suck, but I didn’t want to kill any dial-up modems, just click the thumb to see the whole page.
1. LACK OF MAINTENANCE A lot of people neglect their transmissions. The fluid and filter should be changed at least every 30,000 miles. Failure to do so, can lead to poor performance and premature death. It isn’t that hard to do yourself and doesn’t have to be done very often, so there is really no excuse for not taking proper care of your transmission. (If you don’t feel comfortable doing it yourself, it will cost much less than a new transmission to have a shop do it.) Proper maintenance will insure that you get the most out of your transmission. 2. P1870 This problem is normally noticed as hard shift between first and second gearand or an illuminated "Check Engine" or "Service Engine Soon" light. GM has issued a number of service bulletins on the subject: The most common cause of this code is the valve body: Here’s a picture of the valve body, that I got from a link that blazes9395 posted: 3. IGNITION SWITCH FAILURE Yes, ignition switch, that switch does much more than just make the starter go. Some of the ignition switches that came on these trucks have had problems with the contacts inside. Basically anything that is controlled through the switch can be affected by its failure. 4. REACTION SUN SHELL With this condition you will lose reverse, second and fourth gear. The reaction sun shell is a weakness of these transmissions, unfortunately this problem requires a rebuild or replacement of the tranny. Here's a picture of a good shell: Here's a picture of a broken shell: Here's a couple sun gears, you can see part of the broken shell on the gear on the right: Thanks, to ImageShack for free hosting. Last edited by blazee; 04-25-2006 at 07:13 PM. |
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09-23-2005, 09:43 PM | #2 | |
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Re: Transmission Problems: Common Issues and Solutions
Excellent thread, transmission's are ridiculously complex and everytime I try to figure out how they exactly work, I go cross-eyed.
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09-23-2005, 09:48 PM | #3 | |
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Don't forget about the flyplate! This contributes to transmission damage as well (unbalanced shaft isn't good for the tranny) This is mine, fortuneatly when it happened I stopped driving it
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09-23-2005, 09:52 PM | #4 | |
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Re: Transmission Problems: Common Issues and Solutions
Holy jebus, that was a close one.
How did you know it was about to go?
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09-23-2005, 09:59 PM | #5 | |
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LOL, blazee, I wish you posted this about 2 months ago! I was looking for all this information when I was rebuilding my tranny, especially the component stacking, had to beg to get it from my dealership. I did do the reaction shell upgrade with a hardened unit, along with the sonnax tcc valve correction, put in a better 3-4 clutch pack, the Z-pack from raybestos just to name a few. Great post.
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09-23-2005, 11:06 PM | #6 | |
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Some learn the hard way!
I got my Blazer when I was 16 and because I was a typical teenaged-boy, my rear-end and tranny got beat to hell. (power-braking, Saturday-night racing, and heavy-footed green-lights in 1st gear) So anyhow, about 5 months ago, I was driving home from school, and I started to hear a clank,clank,clank! About every revolution of the wheels, there was a "clank." Being as 'auto-stupid' as I was, I didn't do a thing. A few days later, it got louder, instantly after I dropped the pedal out of the school parking lot. I took it to my dad finally, and he said it had to be the rear end. My nieghbor, a mechanic, said the same. So, two days later, I drove it half-way to the dealership (about 7.5 miles) and then in the middle of an intersection, I was jerked forward and started to hear a very loud BANG,BANG,BANG! So, to end it short, n get to my point, I called a tow-truck, And $2800.00 later I had a new tranny, rear-end, and a knowledge (sort-of) of how to care for my tranny. I bought the truck at about 44,000miles. My tranny went out around 78,500miles. I never, NEVER even checked the fluid the entire time. This isn't what killed my tranny though. Driving it with a bad rear-end is what really did the damage. Now, if I bought a GM rebuilt tranny, do I still have to worry about these Reaction Sun Shells or Ignition Switch Failures? Or does this only apply to older Blazers (Pre-98)? I was also told to service the tranny every 15,000 miles, but you're saying 30,000. Uhhhh??? Help? Thank you in advanced for any help that you can give me!
If you are auto-illiterate, please read this and don't just skim through. It can save you some money. (No, not on car insurance )
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09-24-2005, 03:49 AM | #7 | |
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Re: Transmission Problems: Common Issues and Solutions
Great job and the thumbs are awesome for my shitty dial-up connection. Thanks!!
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09-24-2005, 07:14 AM | #8 | ||||||
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Re: Re: Transmission Problems: Common Issues and Solutions
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http://auto.howstuffworks.com/automa...ansmission.htm BTW... Happy Birthday Quote:
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The 30,000 mile change interval is the recommended time under normal conditions. The 15,000 mile change interval is the recommended time under harsh conditions. This applies to vehicles that do alot of stop and go driving, taxis, emergency vehicles, etc....... Quote:
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09-24-2005, 02:38 PM | #9 | |
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Excellent post! Keep up the good work. What a great read that was!
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09-25-2005, 02:23 PM | #10 | ||
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Re: Transmission Problems: Common Issues and Solutions
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10-05-2005, 06:54 AM | #11 | ||
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Re: Re: Re: Transmission Problems: Common Issues and Solutions
Blazee,
It looks as though my tranny busted the part that takes out reverse, 2nd and 4ht gear. It will go forward but just hums in reverse. Do you know any reputable dealers that sell rebuilt tranny's with all of the proper upgrades. I live in coastal NC. Thanks Quote:
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10-06-2005, 05:14 PM | #12 | ||
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Re: Re: Re: Re: Transmission Problems: Common Issues and Solutions
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As far as reputable places, I don't know any of the places in your area so you would have to ask around. Before repairing or replacing anything, I would verify that 2 and 4 are gone. |
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11-04-2005, 07:05 AM | #13 | |||
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Re: Transmission Problems: Common Issues and Solutions
.......thought that this would be a good addition to this thread, it is part of a thread about a P1870 problem:
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