Any 700R4 experts?
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FTE Leadership Emeritus
Joined: May 2001
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From: Cabot, Arkansas
Any 700R4 experts?
A buddy of mine just called me with a problem. The tranny is his 97 Suburban seems to have taken a dump. This morning everythng was fine, but about halfway home it started "acting funny", but got him home.
Now it won't back out of the driveway, reverse is completely gone, and in the forward gears it will go, but won't shift any higher than second gear.
Also, when he puts it in reverse it makes a horrible metallic skreeching/whining noise that I can clearly hear over the phone.
Is there an electronic gizmo that could be causing this? Torque converter? Or should we skip the troubleshooting and go straight into disassembly?
Thanks,
Cookie
Now it won't back out of the driveway, reverse is completely gone, and in the forward gears it will go, but won't shift any higher than second gear.
Also, when he puts it in reverse it makes a horrible metallic skreeching/whining noise that I can clearly hear over the phone.
Is there an electronic gizmo that could be causing this? Torque converter? Or should we skip the troubleshooting and go straight into disassembly?
Thanks,
Cookie
Junior User
Joined: Jun 2004
Posts: 65
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From: Oklahoma
Not an expert, but ive had many a 700r4 go out. Very common. Most people find the 700r4 to be a weak tranny. They can be built to last by the rite mechanic. This site might help your buddy...http://www.700r4.com.
Kamots
Kamots
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From: Oak Harbor, OH
By '97 it was a 4l60e, or 4l80e. It sounds like the typical GM electronic trans.. Just out of curiosity how many miles are on it? The trans is toast, if it wasn't it would shift past second.....
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FTE Leadership Emeritus
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From: Cabot, Arkansas
Originally Posted by pfogle
By '97 it was a 4l60e, or 4l80e. It sounds like the typical GM electronic trans.. Just out of curiosity how many miles are on it? The trans is toast, if it wasn't it would shift past second.....
Lead Driver
Joined: Feb 2003
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From: Oak Harbor, OH
Yeah, that's about right... MY dad was the shop manager for a local ag company. Their service truck fleet was 2 fords (87, and 88 both 302/aod), and 2 chevys, a 94 and a 95, both 350s with the 4l80e, the 2 chevies lost their transmissions within 100 miles of eachother, is the same week, about 96k miles. The shop guys were all bent out of shape over having to drive a ford with 300k+ miles on it....
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Joined: Nov 2004
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From: calgary
Originally Posted by pfogle
Yeah, that's about right... MY dad was the shop manager for a local ag company. Their service truck fleet was 2 fords (87, and 88 both 302/aod), and 2 chevys, a 94 and a 95, both 350s with the 4l80e, the 2 chevies lost their transmissions within 100 miles of eachother, is the same week, about 96k miles. The shop guys were all bent out of shape over having to drive a ford with 300k+ miles on it....
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From: Damascus-Boring, Ore
Originally Posted by cookie88
A buddy of mine just called me with a problem. The tranny is his 97 Suburban seems to have taken a dump. This morning everythng was fine, but about halfway home it started "acting funny", but got him home.
Now it won't back out of the driveway, reverse is completely gone, and in the forward gears it will go, but won't shift any higher than second gear.
Also, when he puts it in reverse it makes a horrible metallic skreeching/whining noise that I can clearly hear over the phone.
Is there an electronic gizmo that could be causing this? Torque converter? Or should we skip the troubleshooting and go straight into disassembly?
Thanks,
Cookie
Now it won't back out of the driveway, reverse is completely gone, and in the forward gears it will go, but won't shift any higher than second gear.
Also, when he puts it in reverse it makes a horrible metallic skreeching/whining noise that I can clearly hear over the phone.
Is there an electronic gizmo that could be causing this? Torque converter? Or should we skip the troubleshooting and go straight into disassembly?
Thanks,
Cookie
FYI- if you religiously keep those trannies out of OD in town, and NEVER tow a trailer in overdrive, they might make it past 100K. On the other hand, towing a 5000 lb trailer uphill with the selector in OD will cook one of those in less than 100 miles- they only overheat once.
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FTE Leadership Emeritus
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From: Cabot, Arkansas
Thanks for all the input. I finally tracked down a chebbie site with a decent forum last night. Evidently there is something called a "sun shell" in the tranny that is a common fail item, usually takes out the 3-4 band with it. I guess it's rebuild time.
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From: Damascus-Boring, Ore
Originally Posted by cookie88
Thanks for all the input. I finally tracked down a chebbie site with a decent forum last night. Evidently there is something called a "sun shell" in the tranny that is a common fail item, usually takes out the 3-4 band with it. I guess it's rebuild time.
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From: Cabot, Arkansas
Originally Posted by polarbear
You're one up on me- could you share the website?
Check your PM's.
Guest
Joined: Nov 2004
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From: north west new jersey
Originally Posted by cookie88
Thanks for all the input. I finally tracked down a chebbie site with a decent forum last night. Evidently there is something called a "sun shell" in the tranny that is a common fail item, usually takes out the 3-4 band with it. I guess it's rebuild time.
www.levelten.com
pat and his crew can for sure help you out .good luck
