Right Filter Kit?

bytor

bytor

Well-Known Member
Doing my first transmission fluid change on my 87 Corvette with a 700R4. Got a TF235 / 12360655 kit. The filter is shaped differently the what I pulled out of the trany. The gasket matches fine. Did I get the wrong kit? I seem to remember reading somewhere about a filter design change mid 87 or something maybe?
 

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Look at the Drivers Door Data Sticker along the Lock Latch Bytor.
What's the build date ?
1987 Model year started around Sept. - Oct 1986.
1987 Models built to Feb 87 had 1986 Trans actually.
Around end of Feb1987 a new & improved 700 R4 was released.
Different trans filter used.
 
87vette81big said:
Look at the Drivers Door Data Sticker along the Lock Latch Bytor.
What's the build date ?
Click to expand...

4/87

Found the service bulletin. So I think I'm good. This also explains the wider o-ring seal on the new filter.

Number: 87-247-7A
Section: 7A
Date: OCT., 1987
Subject: NEW TRANSMISSION FLUID FILTER AND FILTER SEAL
Model and Year: ALL MODELS WITHTHM 700-R4 TRANSMISSION
TO: ALL CHEVROLET DEALERS

And my new filter looks likes this.


Oil Filter Assembly

A new design THM 700-R4 transmission fluid filter and filter seal is now available. The new design transmission filter is a wider filter that has a felt element in place of the screen element and a shorter filter neck. The filter also has a molded body that locates over the valve body bolts, thus eliminating the need for the filter retainer clip. The new design filter seal is a wider compression type seal that fits snug in its bore.

Beginning July 6, 1987 (Julian date 187) all 1987 THM 700-R4 transmissions were produced with the new design transmission filter and filter seal.
When servicing any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), use the previous design transmission filter and seal until current service stock is depleated. When using the new design filter and seal on any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), the filter retaining clip is not needed and should be discarded.

NOTE: Care should be taken when installing the new design filter and filter seal. The filter seal is a compression type seal and will fit snug in its bore. Damage to the filter neck could result if the filter is installed incorrectly.

To correctly install the filter and seal, coat the seal with petroleum or Automatic Transmission Fluid and with the seal over the filter neck, insert the filter into its bore in the pump assembly. With the palm of your hand gently push downward on the filter until it seats.
SERVICE PARTS INFORMATION:
Part No. Description 8657926 Package - Filter, Filter Seal and Gasket 8657767 Seal - Filter Neck (Available Separately)
 

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There is an Auxillary Valvebody on the Midyear 1987-92/93 700R4 Bytor.
I don't have pictures handy. On my old laptop hardrive that died.
Never uploaded my pictures there to photobucket.
 
The Corvettes Recieved the improved 700R4 trans 1st Bytor.
My 87 Vert was made in April 04, 1987.
Remove the 4 T15 Torx screws holding the gas door to the body.
Underneath the Rails on fiberglass body tub the exact body build date is Electro etched in by hand.
 
Yes Bulletin says it will work.
Install new seal into front case Oil pump 1st.
Push it in with a 17mm Deep well socket.
Lube seal with ATF. Install new filter.
Bump it with the Palm of your hand.
No hammers.
A quick Palm bump will fully seat it Bytor.
 
keep in mind automatic transmissions tend to add a significant amount of heat to radiators that use the lower section to cool the transmission, adding a large efficient trans fluid cooler to the car can also significantly reduce the heat loads on the radiator

many guys don,t realize that adding an oil and/or a transmission fluid cooler, with its own fan and radiator that allows those liquids to be cooled separately, to your engine and drive train, significantly reduces the heat load on the radiator, and generally allows the engine temps to decline noticeably. in fact just adding a high volume oil pan and a transmission cooler can drop your engine coolant temps 20F-30F in many cases, Id also point out that theres generally 3-5 quarts in the transmission oil pan and an additional 5-6quarts in the converter and lines to the trans cooler
prm-12318.jpg


remotefil.jpg

remote mounted oil filters can be used along with an oil cooler to to increase transmission cooler efficiency, and the remote filter and cooler used on a transmission also tends to increase fluid capacity ,and as a result the systems cooling efficiency as the longer the fluid remains in transit outside the trans dissipating its absorbed heat, the use of a auxiliary fan equipped fluid cooler on a performance transmission with a high stall speed converter tends to significantly increase its potential durability.
OilCooler01z.jpg

a rather common issue with adding oil coolers, is that many of the coolers available can significantly restrict fluid flow because of the small restrictive internal cross section of the internal tubing, AN #6 and 3/8" tube coolers can be quite restrictive, the AN#8 are better but DUAL AN#8 coolers and AN#10 lines generally work the best, and there's also frequently limited space to position a cooler in the outside cool air flow mandating a powered fans.
the solution to both issues can and frequently does require use of two different oil coolers but placed in series this can further increase flow restrictions, the solution is in use of larger internal cross sectional area,transfer lines and mounting the twin coolers in parallel thus doubling the effective cross sectional area reducing the flow restriction the cooler potentially could produce if used in series
http://auto.howstuffworks.com/auto-part ... olers2.htm
 
Thanks for the tip on installing the filter 87vette81big, it popped right in. Got the pan and gasket installed and buttoned up for the night. I drained just a little over 4qt's of the old fluid out. Going to put 4qt of new fluid back in tomorrow.

Question is do I stop there or do the coolant line flush procedure where you disconnect the coolant line coming out of the transmission, connect clear hose to it, start the car, pump out 2qt of fluid, stop, add 2 qt and repeat until new fluid is coming out. What do you guys do?
 
Its what I do Bytor.
I have hoses & Radiator cooler fittings made up for the job.
Most of the 11 quart total capacity is held in the torque converter & residual cavaties inside of the 700R4 itself.
 
So what line on the radiator is the transmission output? The service manual doesn't tell you which is which other than this flow diagram. Based on this, the bottom radiator line going into the radiator is the one I want to put a hose on correct?


Another observation is the return 'lube' line doesn't appear to just dump back into the sump. It seem to be distributed to the planetarys and clutches. It's hard to tell in the picture.
 

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Correct Bytor.
If you go to Napa today, purhase a 3/8" X12" inch line with SAE Threaded fittings.
At home bend a 90 degree elbow in the line wirh your tubing bender.
Cut one end off & connect a 3/8" rubber hose to your made steel line adapter.
Unscrew the Top Line at radiator.
Screw the Homemade line flush into the radiator.
Connect the other end if hose into a 1 gallon clear plastic windshield washer solvent bug juice bottle.
All set.
 
Its 5/16" inch line Bytor.
My mistake.
Too early this morning .
 
Got the fluid change completed. Im going check for leaks tomorrow but all indications are i'm in good shape. It was actually the top 'line' side going into the radiator that was the output from the transmission not the radiator side. No biggie, I put hoses on both lines to be safe and not make a mess. I could not find the correct fitting local to tap into the radiator. I'll get one for the next time. Thanks again for all the tips. I feel better now because with the old style filter installed, its a good chance that was mostly the original fluid since the car only has 46K on it. That was the last of my fluid changes, Diff, Brake, Oil, and Coolant all fresh...
 
Good Deal Bytor.
Somewhere I have seen a Trans Cooler line chart in the past.
Don't recall exact where.
Showed from 1958-59- 2001.
All Domestic Makes & auto trans models.
 
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