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7004R-92K1500

Ok here goes..

92 K1500, 350 engine, 7004R transmission.

I've noticed a unusual noise coming from what I think is the transmission at cold start-up. Its almost sounds to me like a pump noise, some type of unusual whine / metal rattle noise. Only hear at initial cold start and or if the truck sits for a long period of time and only when you first start it. Sounds lasts for just a few seconds and then diminishes.

I also hear a "whine" at the various shift points.

Transmission fluid is good.

Another thing, which I believe is related. At normal driving acceleration truck will down-shift and operate "normally". If you are going around

70mph on the hwy and floor the throttle (WOT) the truck will act like its downshifting but the rpms will red-line if you are not careful and the transmission feels as if its in neutral. At WOT going down the hwy from a roll at 70mph the truck wants to rev to the redline and it feels like the truck is in neutral.

I'm assuming that the transmission is about to go up in smoke?? I've made no changes to the transmission or to the engine, I did recently change the gearing , but I don't see how this would cause my problem.

Anyone dealt with a similar issue?

This only happened recently, and I only noticed it one day when I was out driving around. I usually get in some WOT runs to just see what its running like.

I have to say that the transmission feels like its totally slipping at WOT from a kick down at roughly 70mph. If you let off the throttle then truck pulls normally and shifts normally, also downshifts normally.

If I have to replace the transmission any suggestions on an aftermarket Trans or OEM rebuild. B&M, TCI,

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I've seen the above guys web sites but I have no knowledge of their work.

noticed this place for "good wrench transmissions"

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I don't abuse the truck, but I've been known to give it a little gas every now and then. Truck is serviced at regular intervals including Trans fluid and filter.

Reply to
Elbert
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If I were you,I put a GM tranny back in from the dealer. It`s a little spendy,but the warrenty is great. I did that with my '97 Z71,cuz I pulled a heavy trailer alot. Any good shop will put in a GM tranny,but if you have a problem,GM will cover the warrenty. The GM warrenty is 3/50,000 The total cost for the tranny was $1400 installed.

Bill

Reply to
Bill

When is the last time the trans filter was changed?

If your going to go aftermarket, email TCI with what you have and what you use it for. They can built a trans to suit, but they probably have an off-the-shelf design that will be plenty good for what you need. Their prices are great for what you get. On a previous project, they quoted me $2400 for a TH700 with a 550HP/750 ft/lb rating with upgrades that blew me away. The project fell through so I never got to check out that design. They are a top of the line, high quality company that know what they are doing. Yes, they have the typical TH700 for the everyday truck too.

Email 'em, their great!

Reply to
Shades

$1400 for a brand new GM trans installed with warranty? Where did you get this done?

Reply to
Stephen Young

Bill,

Do you recall if that included a torque converter too?

Reply to
Elbert

I don't know exactly but not over 20K

Reply to
Elbert

Was the trans flushed then too?

Reply to
Shades

I was wrong it was $1800 but still cheap as hell. It was done by a shop in MN.

Reply to
Bill

No torque converter. I thought about it,but he said I didn`t need one.Put on another 50,000+ miles before I sold it.No problems.

Reply to
Bill

emailed that GM dealership I posted a link to for a current price $1200 approx (forgot exact price) plus core, but they said this was the standard price at all the dealerships.

I'll have to see what the local GM shop wants. Labor should not be bad on a rear wheel drive, even though they do have to swap out the transfer case.

I'll wait to see what the Trans does and what opinions I can get as to its condition.

I might be able to get a decent deal through the place I use to work but we'll have to see.

I'm guessing at around 2 to 3 hrs labor

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

How many miles have you put on the trans? Any towing? What part of the country do you live in?

Reply to
Shades

on the miles thing I'll have to go hunt for the receipt where the trans was "re-built" seems like a year ago or more.

I don't tow anything

I live in North Central Alabama.

I mainly just drive this thing around on the weekend and to work every now an then just to run it.

I commute about 160 miles a day so the truck is out for daily driv>How many miles have you put on the trans? Any towing? What part of the

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

If your gonna have the dealer install a new tranny,they will kill you with labor. I know they will charge you more than 2-3 hours.

Reply to
Bill

I've not made up my mind what I'm going to do yet. I'm going to have my friend check it out. I don't know yet if the trans is on its way to a meltdown or not.

I do think that 3hours labor is fair on R&R a rear wheel drive transmission even with the transfer case. We'll see what happens, I may have some idea as to what the GM shop transmission guy thinks by Friday. Although I would be the first to admit its a little hard to nail down what exactly is the problem without taking the thing apart.

I'll post a follow up once I know more.

I'm also debating caring it back down to the shop that did the transmission work some time ago to get his take. I live in a small town in AL, where there is only one dedicated transmission shop, and that who I dealt with before. The guy has worked on two of my previous cars and from what I know he does good work.

I'm not going to play the rebuild game again though...I would rather go with the GM Goodwrench transmission deal and get some kind of warranty. Have to see what my options are once a transmission guy has had a chance to at least see what I'm talking about.

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

Sounds like a possibility of something not being set exactly right when rebuilt. Check if they have any warrantee. If they do or don't, I would take it to them and ask if they would do a free check.

Reply to
Shades

about 20K on the mileage question and about 15 months ago.

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

here is my .o2 go wi a th350 trans ...the last truck i called my own was a 91 K1500 chevy...as far as daily driving the 700 is an ok tranny...but in my opinion it just wonthold up to any mild performance upgrades...i had a th350 installed when i rebuilt my ngine toa 383 stroker..and the tranny seems to be doing a great job of it...im now pushing out 490 horses 500 ft. lbs torque and the tranny hasnt even tried to slip...and by the way it is a TCI tranny..they are the topof the line..they offer a good warrenty package d reall reliable performance...if you plan on keeping the truc..go with the best

~nick~

Reply to
NiKoLaS

Anything you can handle with a THM 350, you can handle with a 700R4, ANYTHING!! I have seen built up 700R4's live well behind big blocks and the deeper first and second gear (3.06 vs 2.52 and 1.6 vs 1.52) in the 700R4 is all the more reason to use it over the THM 350. Also for what it is worth, the 700R4 is basically a modified THM 350 with OD added to it.

Reply to
SnoMan

Yea, I don't plan on changing to a 350 for that very reason, plus I want over drive.

Some good news (at least for now). I had the trans fluid and filter changed Friday (kind of a what-the-hell-can-it-hurt) kind of deal and I have to say the truck actually runs a lot better now. No slipping at wide open throttle, no unusual noise at cold start.

I was already counting my pennies and doing the "save up!" routine.

Truck runs good. I drove it today quite a long distance and ran a number of wide open throttle runs to see how it worked. Every time performed good. We've have some pretty cold weather for our area (lows in the 20's) and I've run the truck around town a few times, and no unusual noises at cold start.

All I can say is that the trans filter must have either been a piece of crap or its was restricted somehow. IT was a GM part. This time I just bought all the stuff down at NAPA and had my buddy do the filter and trans fluid along with some other minor things.

It may meltdown tomorrow, but its running good so far. I think at next oil change, we'll do the trans filter and fluid again.

----------- Elbert snipped-for-privacy@me.com

Reply to
Elbert

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