straightshooterjeeps

I have been battling with a knocking coming from under my Jeep for a month or so now. When I went under to tighten the suspected bolts on my flexplate I found that they were not loose. Much to my dismay. (they had been loose in the past)

So I poked around for a couple more weeks trying to decide if indeed my flexplate/converter was making the knocking sound or if it was somthing else.

The sound got worse over time also. By worse I mean it got louder and hung around up into the rpm range to about 2000 before going away.

Now getting under the truck again I decided to pull the 4 bolts out and look at them, look at the holes in the flexplate and generally inspect the entire area real well before deciding to just pull the transmission and hope it really was the plate making the noise.

-I post this because I havn't ran accross a post that gives a example of finding the crack before separating the transmission from the engine.

I removed 3 of the 4 bolts.

Then loosened the last bolt about half way.... I left this one in to maintain connection between the tq and the plate. Just so I wouln't have to fiddle with putting bolts back in too much.

Now the flexplate is pretty much seperate from the torque converter.

Got my flashlight pointed up in there

Grabbed a big flathead screwdriver and started prying on the flexplate

Don't see anything yet

Turn the flexplate a half rotation

Pry again

and there it is! A big fat crack up near the center of the plate.

When the flexplate is loose from the torque converter you can get it to "flex" real good and you just might be able to spot your crack.

Just to be sure you do have one before dissasembly.

It was very obvious at this point, but before pulling those bolts I looked and looked and could never see a crack.

Hope this helps save someone a little time.



Pulling transmission Friday...............

CCKen

Excellent!

Blue Angel

That right there is some useful information. Thanks !!

cruiser54

No fooling.

And this is your first post? WELCOME!

I saved it for future reference.

Straightshooterjeeps cracked flexplate diagnosis

I removed 3 of the 4 bolts.

Then loosened the last bolt about half way.... I left this one in to maintain connection between the tq and the plate. Just so I wouln't have to fiddle with putting bolts back in too much.

Now the flexplate is pretty much seperate from the torque converter.

Got my flashlight pointed up in there

Grabbed a big flathead screwdriver and started prying on the flexplate

Don't see anything yet

Turn the flexplate a half rotation

Pry again

and there it is! A big fat crack up near the center of the plate.

When the flexplate is loose from the torque converter you can get it to "flex" real good and you just might be able to spot your crack.

Just to be sure you do have one before dissasembly.

It was very obvious at this point, but before pulling those bolts I looked and looked and could never see a crack.

Hope this helps save someone a little time.

CCKen

Should be placed in the Technical Write-Up/How To Section.

cruiser54

Done.

https://www.cherokeeforum.com/f51/ch...xplate-172081/

CCKen

Gee oh Dee

Pigeon

I believe if Cruiser saves your very first post 'for future reference', that is the CF equivalent of hitting a grand slam and winning the Kentucky Derby in the same day!

Excellent tip!

cruiser54

I'm thinking so...........

straightshooterjeeps

Thanks guys!

Love the great feedback.

I just finished the task of replacing the flexplate in my driveway today.

Total about 15 hours. Split over two days.

cruiser54

Thank you for the good info. It will benefit many folks in the future.

DFlintstone

He didn't say if that stopped the knock

cjbanshee

yeah great info having the same problem seems like with my 90 xj but will i definetly give those tips a try also im thinking since shooter didnt reply must of fixed his issue

BlueRidgeMark

Bookmarked!