Can you replace flywheel without removing transmission

Can you replace flywheel without removing transmission
04-23-2017, 01:05 PM
  #1

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Can you replace flywheel without removing transmission

 

Can you replace flywheel without removing transmission

 

Join Date: Apr 2016

Location: Cypress, TX

Posts: 2,706

Can you replace flywheel without removing transmission
Replacing the flexplate without removing engine or transmission


I thought some of you may enjoy these pictures. I replaced the flexplate without removing engine or transmission. My truck is a 1969 CST/10 with 350 engine and TH400 automatic transmission. I am a newbie for such an in-depth repair, so if I can do it anybody can. Some of you may recall a recent post of mine where I talked about chewing up my flexplate and needing to replace it.

First of all, the research. I found this interesting forum article:
https://ls1tech.com/forums/automatic...l#post18644698

The only special tool I ordered for the job was a Lisle Flywheel Turner. I highly recommend this tool, it is just great.
https://www.amazon.com/dp/B000FN7JE2/

I did some things slightly different than the article. I did not remove the driveshaft. Instead I just took loose the rear u-joint and the carrier bearing mount bolts, and rested the driveshaft on a strap so it could move front to rear with the transmission.

I disconnected the negative lead of the battery. Instead of removing the starter, I just loosened the inner bolt and remove the outer bolt, and rotated the starter out of the way.

I removed the parking brake cable guide that is right behind the transmission and pushed it up the cable and out of the way, and put a small bolt and nut in place, and hooked the cable under it. It is out of the way for when the transmission moves back. This picture shows the transmission already moved back.

I took out the flexplate-to-torque-converter bolts with help of the flywheel turner tool. I removed the various transmission connections and mount bolts. I put in the 4 long bolts one at a time, and took out the top 2 transmission bolts. I put a jack under the transmission to lift just a little bit of weight. It probably wasn't mandatory, but I thought it was a good idea. The truck was on ramps for the operation. My Home Depot was out of 4 inch 3/8 grade 8 bolts, so I got some 5 inch bolts. It worked great. The transmission slid back on those bolts with little effort, and what I saw was a big work area to get at the flexplate-to-engine bolts.

Here is what the flywheel turner tool looks like.


Last edited by dmjlambert; 04-23-2017 at 01:09 PM. Reason: Corrected the order in which I did some of the steps

Can you replace flywheel without removing transmission
 
Can you replace flywheel without removing transmission

Hi guys,

Wanted to tell about my way to replace the Flexplate without removing the transmission or the T-Case.

Some members say that you just can replace the tranny bolts with longer ones so you can push the transmission back from the engine. Its a fairly good plan but you can´t get any 3/8" thread bolts in germany quick and cheap.

I went and used 3 jackstands instead. One placed under the t-case, one under the tranny pan and one under the engine oil pan.

First of all, I unbolted the exhaust from the headders just to have a bit more space while working.

Second I unbolted driveshafts from the the t-case and the t-case crossmember from the frame.

3. Lowered the whole engine transmission t-case assembly down so you can reach the upper bolts on the bellhousing a bit easier and took them out. Make sure you don´t stretch any wireing or lines or break anything in your engine compartment while lowering.

4. Pushed the whole engine transmission t-case assembly back up in its original position.

5. Removed the converter bolts and the last bolts which connect the tranny to the engine aswell as the electrical connectors and speedo cable on the t-case and transmission..

6. Simply push the car foreward enough so that you can reach the flexplate bolts.

While doing this its better to work with 2 ppl so you can rise and lower all 3 jackstands together consistantly.

When you replaced the flexplate go ahead and put everything back together in reverse order.

Hope I can help some guys and save some time, nerves and money.

Greetings, Redneck92

Heck if you would have given me your address I would have sent you some 3/8" bolts. That is way to much work for me. How much time did you have in that job? We have no problems getting metric bolts in the USA. I am glad you got it done. But man that was the hard way to do it. Git er dun must be your motto. I sort of live by that motto also but that is a long hard struggle that you went thru. How many brews did it take?

Thanks man for your good intentions. Realy apreciate it. But as you said... gettin her done... and this as quicky as possible. It's my daily Driver and so there is no Time waiting for parts. The Job Took me About three and a half hours without realy hurrying up. Next time I am quicker Sice I know where to place what stand and Tools

Can you replace flywheel without removing transmission
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Sorry for the Small / big Letter chaos. German smartphone types with German rules

Can you replace flywheel without removing transmission

Can you replace flywheel without removing transmission

Well done Herr Redneck92!!

Rick

Can you just change a flywheel?

While a solid flywheel can be removed and resurfaced at Mr Clutch Autocentres by undergoing a skimming process, which can save the car owner a lot of money, wear characteristics on a dual-mass type, which tends to be fitted to more modern vehicles, lend themselves more ideally to the good practice of replacement.

Do you have to pull motor to replace flywheel?

The engine is bolted directly to the transmission, with the clutch and flywheel in between. You need to either pull the engine, drop the transmission.

How long does it take to replace a flywheel?

Depending on the model and make of the vehicle, the average time for flywheel replacement is between five to nine hours.

How hard is it to change a flywheel?

Changing the flywheel is a complicated and time-consuming procedure. It requires disassembling the gearbox and the clutch assembly to gain access to the flywheel. When replacing the flywheel a good idea is also to inspect the bearing supporting the crankshaft and the flywheel seal and to replace them, if necessary.