I see a lot of threads about whether to flush the 700R4 or not with 100k+ miles. A friend of mine got a '90 IROC show quality from the original owner. He drove it about 1k miles a year since new. He never changed the 700R4 fluid.

I think she should get it flushed and put in fresh Dexron 6. The fluid still looks new on the stick. The car has 27k miles on it and runs flawless.

Good idea?

don't do a flush pull the pan and change the filter. Dextron 6 is awesome dropped my trans temp in my truck 75 degrees.

My concern is the age of the fluid. Is that something to worry about?

yes its old, but some flushes the just pump out the old and put in the new , the filter does not get changed.

what is the "stock" type of fluid for a 700R4? I wanna put Royal purple ATF in mine but, idk if that would work?

any updates ?

I'll do the flush and on the nex motor oil change would replace the filter with the requerid amunt of oil.