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Old 12-17-2016, 09:28 PM   #16
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Re: 98 C/K 4X4 Automatic Tranny Problem

thanks again to j cAT, 777stickman, Schurkey for the reply's.

we took the truck to a transmission shop. they said the torque converter is bad.
with that said, we will be rebuilding this tranny. we will also be putting dexron VI, thanks for the tip j cAT.

not sure how this rebuild will go but, we are looking on line and so on for tranny rebuild kits, complete rebuilt trannys and so on.
we would really like to just switch out this old tranny for a rebuilt tranny.

one question, how can i tell if this tranny is a 700r4

any suggestions would be welcome.
thanks again
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Old 12-18-2016, 05:22 AM   #17
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Re: 98 C/K 4X4 Automatic Tranny Problem

A TH700-R4 has a TV cable at the throttle body linkage, no shift solenoids, and would not very likely be installed in a 1994.
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Old 12-18-2016, 11:19 AM   #18
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Re: 98 C/K 4X4 Automatic Tranny Problem

i would put a pic up but this site gallery sign up/attachments does not work? photo bucket did not work also.
it is amazing what a pain in the butt the net has become.
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Old 12-18-2016, 12:59 PM   #19
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Re: 98 C/K 4X4 Automatic Tranny Problem

a 1998 gm truck comes with the 4l60 for that model year. now to install a 700r4 in it that would not make any sense since those transmissions suck and the cost and work to make it work would be insane . look at the connector to the transmission see if it has a lot of wires to it if so its a 4l60 .
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Old 12-18-2016, 07:38 PM   #20
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Re: 98 C/K 4X4 Automatic Tranny Problem

i was told this might be a 700r4. i am looking at the 4l60 now.
so here are some pics, maybe this can help someone know for sure what tranny it is.

thanks again









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Old 12-19-2016, 07:20 AM   #21
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Re: 98 C/K 4X4 Automatic Tranny Problem

If that is the original pan, it is a 4L60E. The TH700-R4 had either a flat bottom pan or a ridged bottom, not the stepped bottom as the 4L60 used. The indentation for a drain plug was also not on the 700-R4.

Moreover, the bolt on bellhousing is a 4L60 feature.

The first photo also shows the range selector switch, which is not a 700-R4 feature.
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Old 12-19-2016, 10:24 AM   #22
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Re: 98 C/K 4X4 Automatic Tranny Problem

thanks, we are now looking for a 4L60E.
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Old 12-21-2016, 03:44 PM   #23
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Re: 98 C/K 4X4 Automatic Tranny Problem

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thanks, we are now looking for a 4L60E.
that pan is the deep pan on the 4l60 . also as was mentioned this does not have a down shift detente cable which the 700R4 must have. tranny shop that looked at this I would not use , most likely not a GM service shop or newbies in the business. just be sure the connector is the same on the replacement tranny because if its different it is the wrong tranny.
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Old 12-21-2016, 10:16 PM   #24
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Re: 98 C/K 4X4 Automatic Tranny Problem

When searching for a replacement, be aware that not all model years will be compatible.

The solenoid arrangement and the solenoid coil resistances varied across the model years. Your PCM would likely generate a fault code and/or not shift the transmission if it detects a solenoid out of the correct resistance range.

It should be safe to use a unit from a 1997-2003 but verify that with the interchange guide at you local salvage yard. Earlier units had different solenoid resistances and different arrangements. For example, the 1993-94 units used an 11 pin connector. The 1995 units used a 12 pin connector. Later units used a 16 pin connector. The pump bodies and porting were different, the TCC scheme was different, and the 3-2 shift and downshift schemes were different. Installing the wrong trans to the wrong PCM can not only generate codes, but can cause long term problems with overheating, shift problems, and clutch failures.

To complicate matters, the speedo connection may be on the wrong side, and transfer case mounting may vary.

Again, verify the replacement with an interchange guide.
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Old 12-22-2016, 03:11 PM   #25
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Re: 98 C/K 4X4 Automatic Tranny Problem

once again, great advise and it is very much appreciated.

we are going to have this tranny rebuilt. looking to get a new torque converter and a rebuild kit.
this seems to be the cheapest way to go. this will still cost me about $1000.00, still better than $1500.00 to $2000.00.

will keep you all updated, thanks again
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Old 12-22-2016, 03:26 PM   #26
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Re: 98 C/K 4X4 Automatic Tranny Problem

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we are going to have this tranny rebuilt. looking to get a new torque converter and a rebuild kit.
this seems to be the cheapest way to go. this will still cost me about $1000.00, still better than $1500.00 to $2000.00.
$1000? I'd have figured double that.

The 700 in my '88 K1500 cost $1600 back in 2001 or thereabouts. I did need some hard-parts--a planetary set has completely wiped-out it's roller bearings and put metal shavings EVERYWHERE. Of course, it got a sun-shell and other hard-parts, too. This also includes the R&R labor and a TransGo shift-kit, in addition to the rebuild.
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Old 12-22-2016, 04:30 PM   #27
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Re: 98 C/K 4X4 Automatic Tranny Problem

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Originally Posted by 1998_CHEVY_4x4 View Post
once again, great advise and it is very much appreciated.

we are going to have this tranny rebuilt. looking to get a new torque converter and a rebuild kit.
this seems to be the cheapest way to go. this will still cost me about $1000.00, still better than $1500.00 to $2000.00.

will keep you all updated, thanks again
with a new torque converter and $1000 to rebuild it , that is cheap. I would install a in line tranny magnetic fluid filter at the radiator line up front. then after some use check it out for metal debris . the magnet filters work great to capture all the crap from the old damage and whatever got loosened up from fixing. these are cheap insurance ..
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Old 12-22-2016, 07:59 PM   #28
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Re: 98 C/K 4X4 Automatic Tranny Problem

That's about right for a full rebuild. I've done several for less than $250 in parts, including all the shims, frictions, separator plate, pump vanes and slide, and moderate updates. More than a few small parts will start ratcheting up the cost, but it's pretty hard to spend more than $750 in parts unless you bolt on a factory new valve body and numerous other parts. A good, 30,000 mile guaranteed GM factory reman converter can be had for about $125 exchange price, and is worth every cent on a trans with over 100K miles.
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Old 01-12-2017, 02:29 PM   #29
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Re: 98 C/K 4X4 Automatic Tranny Problem

ok so, my buddy took the tranny off the truck and realized the torque converter was hooked to the flywheel in some way?
i guess the oil pan has to be taken off to get to/remove the torque converter. any of you guys have clue what this is about?
he said this set up was only done for 3 years, then chevy went back to having a dust cover that made this torque converter easy to remove.
so much for saving some money

thanks for looking
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Old 01-13-2017, 01:14 PM   #30
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Re: 98 C/K 4X4 Automatic Tranny Problem

so looks like my buddy was just worried about nothing? anyway, hopefully i will have more news soon
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