2004 lq4 (short crank snout)
stock ls1 flexplate
yank ss 4000 stall
truck 4l60e with ls1 f body bellhousing

there is a gap about half an inch between the flexplate and the bolt flanges on the torque converter?

i thought it should be a direct fit and not require the spacer from gmpp?

 

it should! try pushing the converter forward. it should slide on the input shaft, then try putting the bolts in.GL

 

Sometimes a converter needs to be shimmed. On my yank ik I needed 1/8" of spacers to make the correct gap which should be 1/8" or so. I'd call yank and see what they have to say about it.

 

i had to send them an email, they arent there on a saturday afternoon. its deffinatly more than 1/8 inch more like 7/16 to 1/2

 

Any suggestions?

 

I ran into the same thing bolting my 200-4r up to an LQ4 with the 4l80 flexplate. It is a good 1/2" off. I am going to pick up some of the torque converter shims and longer bolts and go from there.

 

You can use regular washers to shim, you don't need specific converter shims.

 

i've always had about a 1/4" gap between my converter/flexplate and just bolted it up tight, and i've never had any problems without shims.

just make sure you progressively tighten each bolt instead of going all the way in, because the one sticking out will catch on the block when you try to spin it for the next bolt.

 

Called Dave at yank this morning and spoke to him about it... An older transmission even with the removable bellhousing will NOT work. The input shaft and pump are different. Hence the reason i have such a large gap.

 

i didnt realize any of the older ones had removable bell housings.

 

Yep, the transmission is out of a 98-99 tahoe 5.7 sbc

 

ohyea. i forgot they still made 350s until 2000.

 

Yep I'm waiting on an answer from a place on a pump. Then spending $200 on a pump, stator, input shaft and drum.

 

So you're trying to use a newer model converter with the older tranny and it doesn't work because the input shaft and pump are different? Did I read that correctly? So if you use a converter for the older style transmission do you need the spacer or not? Or do you know?

The reason I ask is that I wound up with a 4.8 and a 98 4l60e and I cannot for the life of me figure out if I need the spacer or not. I would go out in my garage and check the clearance but I'm about 3000 miles away from it right now so any help is appreciated.

 

If you have a 98 ls1 transmission you need a new converter. Or if its a truck one like mine you need the old style converter or a custom made one. I ordered the pump stator input shaft and drum for mine to convert it to a newer style transmission.

 

Sorry forgot to specify it's out of a Silverado. I left the stock converter in it, but just need to know if I need the flywheel spacer. Does anyone know?

 

I'm not positive but pretty sure you will need the spacer and a special flexplate.

 

Im running same engine and older 4L60E.
used the Hughes Spacer and a stock 5.3 flex. with the tq converter holes elongated in the flex.

 

Awesome, thanks. That's a load off my shoulders