8hp70 bypass thermostat install

[crazykid1994]

Parts list for those doing a 8hp70 swap and want to add a bypass heater or people doing a heater delete but want to keep the temps up some for cooler weather. This will need the existing thermostat block on the side of the trans and delete the heater and thermostat. If I remember correctly 2 - 3/16 threaded plugs were used to block the heater ports on the thermostat block. Per another member the thermostat block uses -8 ORB fittings to connect to the factory hard lines. I will try to confirm when I can. I chose a 145° bypass thermostat for mine. The next temp up is 160°. The temperature is your choice. Ram uses a 180° thermostat stock. I am using -8an hose and fittings. I am hoping as of right now that 180° u fittings will fit on the side of the trans. I have -8orb to -8an adapters for the top fittings of the thermostat block. Straight fittings into and out of the bypass thermostat. I will be using straight fittings at the hard line changeover connection. The bypass thermostat was offered with -10 orb fittings to a few different sizes but I opted for the -10orb to -8an thread. -8an tube sleeves and tube nuts for the hard line changeover connection. I purchased a 37° flare tool. Most part numbers are in the picture. Only parts missing are my -8an hose to -8an male thread. Should be here in 2-3 weeks. I’m not sure the cooler line size for the 545 or the 6 speed so you’ll need to measure that. Or run -8 am line to a standalone transmission cooler. I may swap to a standalone cooler in the future for my truck.
@Wild one can you share your pictures of the heater delete and the transmission fluid check procedures.

 

[Wild one]

Here you go Khris

 

[smoothee]

Appreciate it fellas. I ended up going with the 145 as well, ordered an adjustable an wrench too. Now just need to find a decent (reasonably priced) flare tool. The parts for the swap are slowly trickling in...

 

[crazykid1994]

Appreciate it fellas. I ended up going with the 145 as well, ordered an adjustable an wrench too. Now just need to find a decent (reasonably priced) flare tool. The parts for the swap are slowly trickling in...

You can rent one. I just know the parts stores by me have a really poor selection on rental tools since most times they get returned damaged or missing pieces

 

[smoothee]

You can rent one. I just know the parts stores by me have a really poor selection on rental tools since most times they get returned damaged or missing pieces

I might look into it but I imagine I'll be in the same boat as you, not many options around here. Same goes for a transmission jack. Not bad tools to have though I spose

 

[healthyrx]

You can rent one. I just know the parts stores by me have a really poor selection on rental tools since most times they get returned damaged or missing pieces

Isn't south Florida just a wonderful place full of wonderful people

 

[Jwithing]

Parts list for those doing a 8hp70 swap and want to add a bypass heater or people doing a heater delete but want to keep the temps up some for cooler weather. This will need the existing thermostat block on the side of the trans and delete the heater and thermostat. If I remember correctly 2 - 3/16 threaded plugs were used to block the heater ports on the thermostat block. Per another member the thermostat block uses -8 ORB fittings to connect to the factory hard lines. I will try to confirm when I can. I chose a 145° bypass thermostat for mine. The next temp up is 160°. The temperature is your choice. Ram uses a 180° thermostat stock. I am using -8an hose and fittings. I am hoping as of right now that 180° u fittings will fit on the side of the trans. I have -8orb to -8an adapters for the top fittings of the thermostat block. Straight fittings into and out of the bypass thermostat. I will be using straight fittings at the hard line changeover connection. The bypass thermostat was offered with -10 orb fittings to a few different sizes but I opted for the -10orb to -8an thread. -8an tube sleeves and tube nuts for the hard line changeover connection. I purchased a 37° flare tool. Most part numbers are in the picture. Only parts missing are my -8an hose to -8an male thread. Should be here in 2-3 weeks. I’m not sure the cooler line size for the 545 or the 6 speed so you’ll need to measure that. Or run -8 am line to a standalone transmission cooler. I may swap to a standalone cooler in the future for my truck.
@Wild one can you share your pictures of the heater delete and the transmission fluid check procedures.

Sweet, I've rarely been hitting 130 in the winter. Only on long drives. Typically 120ish. 145 sounds much better.

Can you repost a closeup of the part numbers you used. They're just a tad bit too fuzzy for me to make out.

 

[crazykid1994]

First picture is parts from improved racing. The other parts are from summit racing. Still missing my -8an tube to -8an male straight fitting

 

[Jwithing]

Just an FYI, looks like next temp up is 165, not 160.