Engine/Transmission (1994 - 1998) transmission line fitting?

[98slushbox]

I am looking for the screw in adapter fitting for a 47rh that the transmission line pushes into. I havent checked a dealership yet, hate to and dont even know if i can get one there. Does anyone have one or know where a good place to buy one is? thanks,

Lance

 

[Lsfarm]

Cooler line fitting

If you looking for a cooler line fitting, the old push-in type lines were changed to a thread-in type fitting. This was a dealer recall. The push-in type fitting proved to be less-than-reliable, and caused a lot of transmission failures.



I would recommend upgrading to the thread-in type lines and fittings.



You may be able to find the push-in type fittings from a trans shop that has some used ones lying around after upgrading a customer's lines.



Hope this helps, Greg L

 

[Howard Durand]

I don't recall there ever being a dealer recall on those fittings. I had to have my lines replaced (by a dealer) at the tune of about $700, which included towing.

The original fittings on mine were not the ones with the plastic in them, they had a wire clip that held them in place. There was a rubber seal that kept them from leaking for a while. When they started to leak, there was no replacement seals available.



I happen to have kept 4 of the original fittings and, if they are the type you need, you can have them but they are not the ones that require a plastic clip.



Howard

 

[Joe G.]

There was a safety recall on the cooler lines. For some crazy reason it didn't apply to diesels. All of the push in fittings are JUNK!!! My original fittings with the wire clip failed. A clip fell out on a Sunday morning in Carson City, NV. I used a case of ATF to get home to Eureka that day. The dealer told me that they had been replaced with better fittings. Those had more plastic. They failed quicker than the originals. I replaced the fittings with compression brass fittings with NPT on the transmission end of the fittings. Then the steel lines managed to wear a leak where they cross in front of the transmission pan in spite of my efforts to prevent that. I replaced all my cooler lines with hydraulic hose. No problems since and no cooler line leaks. The stock temp sensor connector has a resister in it now to fool the CPM to behave as if the trans is up to operating temp all the time. There are a few fittings between the hose and the cooler output from the trans for my trans temp gauge. No more screwing around with transmission cooler lines!!!

 

[98slushbox]

Joe G. ,

I didnt explain myself correctly. You are right. I am looking for the brass thread in adapter. It looks like I need an adapter from a male to female that goes between the transmission and the line. I am doing a conv. from man. to auto and am trying to piece it together as i go. Do you know what fitting I am trying to explain?

 

[Howard Durand]

98slushbox,

There were two types of fittings on the earlier trucks. One has a plastic retainer in the fitting that holds the line in place when it is pushed in. The plastic tends to melt when overheated.

The other, like I had on mine, is designed so that the line is held in place by a wire clip. Somewhat like a haripin. The line itself has a collar formed into it about 1/2 back from the end and a neoprene seal located between the collar and the end of the line.

The fitting is made so that the line is pushed into it then the wire clip is inserted crossways behind the collar to hold the line in against the seal.

The threaded portion is a male pipe fitting and there are two sizes. 1/4" and 3/8" npt.

I think the 1/4" fitting is the one that goes to the transmission and the 3/8" ones are used in the heat exchanger.

I have two of each one of these. If that sounds like what you need, you can have them.

Howard

 

[Joe G.]

Joe G. ,

I didnt explain myself correctly. You are right. I am looking for the brass thread in adapter. It looks like I need an adapter from a male to female that goes between the transmission and the line. I am doing a conv. from man. to auto and am trying to piece it together as i go. Do you know what fitting I am trying to explain?

Not exactly. Do you have the OEM trans oil to air cooler that mounts in front of the radiator? And the OEM trans oil to coolant cooler that mounts under the exhaust manifold? And the OEM cooler lines? If you have the latter which year truck are they stock on? If you have the coolers but no lines I would advise using low pressure hydraulic hose. In that case you need a 1/4 NPT and 3/8 NPT to barbed fittings for the size hose you use. If you have the OEM cooler lines then I would advise using 1/4 NPT to 1/2 compression and 3/8 NPT to 1/2 comperssion fittings. If you don't have the OEM coolers then the OEM lines won't work anyway.

 

[98slushbox]

I think I need the npt to compression fitting. I have the stock lines off of a 94 2wd and have the oem heat exchanger on the side of the block. I havent got a transmission cooler for the front of the truck yet, but i will probably just buy an aftermarket. The lines go from metal to rubber at the front of the truck, so i think i'll just hose clamp them on an aftermarket cooler. I guess i will try a local parts store to see if i can get the fitting you explained, if not i guess i'll have to order it.

Howard, i dont think the ones you have will work for me unless you have an adapter style with threads on both ends as Joe explained.

Lance

 

[Howard Durand]

Lance,

Your stock lines originally used one of the two attachment types I mentioned but neither one is very successful. When I had to replace mine the new lines that were installed by the dealer use flare type fittings. Which, in my mind are the best way to go but that would be difficult to do on a retrofit.

I think you can find compression fittings and adapters, such as Joe is talking about, at a good parts store that carries "Weatherhead" brass fittings. They are available in just about any configuration you could want.

Howard

 

[Joe G.]

Do you have a PCM for an automatic? If you do then you need a temp sensor or fake it with a resister. I suspect that won't work too well without the automatic wireing harness and a TPS. If you don't have that, then you need to use switches to control OD and TCC lockup.

 

[98slushbox]

Howard, I just need one fitting, like the ones you spoke of earlier, npt to compression. I'm sure i will have to order one somewhere or go to a city, because the whole"good parts store" issue. probably not gonna happen in my small town. We have an o'reilly's but not much help there. thanks

Joe, I did swap the pcm with an auto. pcm. Is the temp sensor you are speaking about in the transmission line with a plug from the wiring harness? I swapped out my wiring harness also. I am installing a B&M ratchet on the floor and bought an aftermarket switch for OD. I think i will have everything to make it work correctly.

Lance

 

[Joe G.]

Yes, there should be a plug to fit the temp sensor. If you have the plug you can fake the sensor with a 1K resister. You also need a switch to control torque convertor clutch lockup. The lockup clutch on the 47RH is not like earlier lockup clutches that were mechanical. This one has a solenoid to cause it to lockup.