Introduction and help needed: 1988 6.5 Suburban

[AugustDiesel]

Hello all,

I had posted a while back in the 6.5 turbo forum but perhaps I may be better suited here since the engine I have is not a turbo, but an NA 6.5 goodwrench warranty engine.

In my last post, I had discussed a severe leak from the 4x4 700r4 transmission when in reverse. I have since found out that the case was cracked. Ended up replacing the transmission with a beefed up and rebuilt 700r4 and all seems to be doing well. Which brings me to my current question:

My transmission cooler lines are worn out. Corroded, rusty, cracked in some places thereby leading to rubber hose patches that I'm not all that confident in. I want to replace them and LMC Truck sells prebent transmission cooler lines, however, they have two different part numbers, both of which are applicable to my situation:

34-5718: 4x4 Diesel
34-5719: 4x4 TH700R4

As you can see, both are applicable as I have both a Diesel engine and a TH700R4. The truck was originally a 6.2 diesel from the factory so I don't think having a 6.5 makes a difference.

Anyone have any ideas on which is the correct part number?

Here is a current pic of the truck. It's a project for sure, and needs a lot of work, but is coming along:

IMG_4333.jpg

[trbankii]

In your situation, I’d check with LMC. They’ve been very helpful when I’ve had questions about their products.

[AugustDiesel]

In your situation, I’d check with LMC. They’ve been very helpful when I’ve had questions about their products.

Thanks for your quick response. I forgot to mention that I actually did call LMC first and the lady I spoke to said to ask a mechanic because they would not be able to advise me. So I figured I'd start here since this forum is 6.2/6.5 specific.

[DmaxMaverick]

If a supplier offers multiple products for one application, it is their responsibility to describe the difference(s). If they don't, then they don't deserve your business. I've had many contacts and purchases from them, and never experienced that attitude. I suggest another call. Your mechanic can't determine what LMC's products will fit without a proper product description and fitment advise. For a customer service rep. to suggest otherwise is ridiculous.

[trbankii]

Totally agree with DMax. Any mechanic is going to say the same thing you are - it’s a diesel AND it has a TH700R4, what are the differences in the two products you are providing?

[AugustDiesel]

I agree with you both. I did call a second time and got a different lady who said they are not able to give technical advice, but, she did look through the catalog with me and she thinks it may be the 35-5719 for the 700R4 but still is not sure. At least she didn't blow me off like th first lady did. Still don't want to place the order until I know I'm getting the right part. Perhaps I should look at building my own lines from stainless steel hose or something? Wish I could get through to someone at LMC with some technical knowledge but I keep getting these reps who only know what their computer screen is telling them.