After installing a new pump bushing what is the inside diameter? New bushing that I have is 1.880 before install.

after looking through several FSM's and a couple of ATSG's, i could find nothing about what the bushing id should be after installation.
there was no information on burnishing the bushing after installation either, with only mentioning the careful removing of any burrs after staking the bushing in place.
generally, the id will shrink a couple of thousandths, how many depending on the bushing material.
hopefully mr. Kunkle will chime in with the answer.
until then, consider this a bump.

After putting a new bushing in I always test fit the converter snout in it .They always need a little tweaking for me. They are usually tight. You see where it need some massaging by the shiny marks, usually around the stake area.

I've never seen a published spec either. The rebuild spec for the converter hub is 1.876" max.

I have heard that you can use a turbo 400 front pump bushing they are supposed to be the same as that in a 727

Appreciate the replies. I might try the GM bushing and snug things up a little bit, looking for about .003 final clearance I think?

If there is no spec? Why try to reinvent the wheel? The replacement Babbit bushings work well. In fact the last two freshen ups mine didn't get a front bushing or a new front seal. If it aint broke, don't change it. I asked about the 400 bushing. I was told though it fits the pump, It's actually slightly larger.
Doug

The original bronze bushing has opened up to about 1.880, coincidentally that is the same measurement that I get with a new replacement before installation. I guess the only way to find out how much ID is lost is to go ahead and install one. Seems like babbitt would crush down more than bronze, but who knows for sure.

The steel backing determines the amount of crush/preload not the surface material.

Been at this over 50 years, haven’t seen anyone seize or fail a bushing when properly installed. Lockup converters are more critical of impeller hub to bushing excessive clearances.

I never tried the 400 bushing, just something I had heard about

Been watching this and I don't understand the desire to risk spinning a FP bushing, and trashing the trans, converter, and pump housing because someone said it was a good idea
So I'll go with DW on this one. No offense meant just

I have a radiator that I remember it coming out of a 70's truck but am unsure of its application. Part number is 3736949. Any idea what it is out of, I did a search but couldn't find anything. Thanks

No offense intended but you will get more response if you start a new thread instead of piggy backing on a totally unrelated thread.

Now I see that you did start a new thread. No idea why it shows up here as well.

Just to clear a few things up, the TH350/400 pump bushing has a slightly smaller ID than the bushing for the 727. It is also slightly longer which may be part of the confusion when someone says that it is a "larger" bushing.

I have an original pump cover/bushing, worn evenly out to 1.880 and a converter drive hub that measures about 1.870 that is not grooved (slightly undersized when new?). I'd like to cut that .010 clearance but don't know what the installed ID of these new bushings are.

FWIW, the rebuild dimension for the TH350 and TH400 hub is 1.873" as opposed to the 727's 1.876". The aluminum PG is also 1.873".

Thanks. That put things into perspective a little better.