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smackzed 12-08-2009, 09:17 PM I just bartered for a parts truck that has a 700r4, my truck has a th400. I understand that the different trucks use the vacuum pump for different things and I'm just wondering if they're the same pump or not. I;m running on a borrowed pump right now and should give return it soon. Can I use the one from the 700 without issue? Thanks Sean 4doorTAHOE6.5TD 12-08-2009, 10:51 PM Just hook vac pump to the VRV on the IP.Other use is heater/AC controlls. smackzed 12-09-2009, 10:38 AM So that's a yes? Same pump? MDchanic 12-09-2009, 11:11 AM Vac. pumps should all be the same, function-wise. I can't vouch for the fit - there may be some that don't play well with your belt configuration. The one on my truck serves no purpose at all (I have no vacuum-operated systems), but has to be there for the serpentine belt to go around. - Eric 4doorTAHOE6.5TD 12-09-2009, 02:15 PM That is it,same Vacuum pump ,but you should check the pump for proper amount of vacuum.The HVAC system is operated by the pump also smackzed 12-09-2009, 03:56 PM Well my pump is gear driven not belt driven and is located behind the intake where a distributor would be on a gas motor. I guess if they look the same I'm pretty safe Diaric 12-09-2009, 04:41 PM i've had them from 82, 84, 86 & 87.they were all the same smackzed 12-09-2009, 05:26 PM Thanks diaric. Jodean 12-09-2009, 08:13 PM someone was just talking bout the vacuum pumps, i guess you can just swap the pod, even from a belt drive to a intake driven....... smackzed 12-09-2009, 09:11 PM what's the pod? is that the circle thing on top? If so can you buy a new one? I don't know for sure that the pump from the donor truck works and I think a whole new pump costs about $160cnd Jodean 12-09-2009, 11:34 PM i dont think you can buy the pod anymore, just swap in an old one or pony up the $160 which is about the right price..... | ||