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It sounds like the SD709 shouldn't have any issues playing nice with R134a then. I'm thinking that rather than trying to retrofit a newer system on, I should get acceptable performance from replacing all the old parts in my current system with new ones. Maybe if this system fails again in the...

That's what I had understood as well. They look like they would bolt-in to replace each other, although the AC hose connections are obviously different.

I believe the difference is that the SD709 uses the thread-on style connectors and the SD7H15 uses the block-type with a central nut. I also believe that the SD709 was originally meant for R12 applications and the SD7H15 was meant for R134a applications, but I don't know that for sure, hence my...

So if I left the old evaporator and installed a whole 97 system underhood my new ac lines wouldn't be able to connect to the old evaporator? Is that due to the quick connect versus thread-in connectors? R12 isn't an option for me, if I'm gonna replace everything I'm gonna do it right and put in...

Do your 95 and 96 both use the SD709 compressor or the SD7H15? My R12 system has the SD709, and from what I've read the SD7H15 is an improved version of the SD709... maybe the improvement was R134a compatiblity?

That's what I'm trying to do. I want reliable AC so I intend to replace basically all of the parts I can. AC has never worked for me, and the previous owner never converted it so I need to do the whole R134a conversion myself. It just seemed like it might lead to a more reliable system to put a...

Hello everyone, I recently added a new vehicle to my fleet, a 1992 Cherokee with the 4.0. It's in pretty good shape, but one of the major systems not working right now is the AC. Since the system is on R12 and hasn't worked in years, it occurred to me that rather than rebuilding the R12 system...