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ive read this is a common problem and i am looking at the merchant automotive repair kit below

https://www.merchant-automotive.com/10207-Transmission-Cooler-Line-Repair-Kit-.aspx

is it worth while? ive seen other kits that replace the complete lines and fittings with AN style stuff im sure that works well but im not really interested in doing all that work if this repair kit works. anyone have any experience with it?
 

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ive read this is a common problem and i am looking at the merchant automotive repair kit below



https://www.merchant-automotive.com/10207-Transmission-Cooler-Line-Repair-Kit-.aspx



is it worth while? ive seen other kits that replace the complete lines and fittings with AN style stuff im sure that works well but im not really interested in doing all that work if this repair kit works. anyone have any experience with it?
It is a very common problem. Worried me when my second one started doing it. I first replaced with OEM and then the second one leaked and just bought the fleece replacement kit. Super simple to install. I think they're about the same price.

A lot of different options to suit your plans/budget, but yeah they are all gonna leak eventually if you live in a cold to hot climate.

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It's not going to hurt anything by doing this conversion, if that's what you're asking. I've talked to a few of the guys at merchant about other problems with my truck and they have always seemed to be good knowledgeable people so I'm sure it's a good quality product.

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I did the Fleece Performance lines from the Duramax Store. I didn't want a repair kit. I wanted something that was one piece, new from end to end.

Leads to a story about rip off mechanics. I had an employee install them because I had just had shoulder surgery and couldn't. I later brought it to a Tuffy service center by the house for an alignment and coolant flush. I told them I had three work trucks and my wife's car. I told them I was there because I was temporarily disabled, not because I can't turn my own wrenches which I had been doing for 30 years. If they didn't try to sell me rooty rods or muffler bearings, they'd be my go to shop.

They laughed about the rooty rods and muffler bearings and assured me they don't do things like that. When I went to pick up the truck, they said the [brand new Fleece Performance; the newest, cleanest, shiniest parts on the truck] tranny cooler lines were worn out and needed to be replaced. I said they're brand new. He started back peddling and mumbling his way out. Turns out, one of the fittings was left untightened. All they had to do was touch it, it wasn't even finger tight. They could have said hey we tightend that line for you. Or. hey we tightened that line and checked the others, it will be $20.00 extra. I'd have said great! Thank you! Instead... they just couldn't resist trying to scam me. Come to think of it, as I'm writing this, I wouldn't be surprised if they loosened it. I just assumed the employee was careless.

Edit: They also did a lousy job on the alignment, the steering wheel isn't even close to straight. It's turned to about 10:00 going straight.
 

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Marcy - the stock OEM lines have been improved and are much cheaper than the very nice, very good, aftermarket lines. I have been running the improved OEM lines sine 2010 and they don't leak a drop. I live in Kansas in the summer, Arizona in the winter, no really cold weather for long periods. Cost was right at $105 for all 3 lines.
 

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Same here. Only two were leaking on the LBZ, but the OE 3 set for $100....why not all of 'em.
It was at the 100k change point for the TES-295, so that worked out well with all of the above.
70k miles later, new TC....so I'm fresh again for another 100k on the Delvac full syn.
 

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I'd vote for replacement.
I had an OEM tranny line blow out on me while on a trip.
It was very expensive for tow and replacement at a Stealer.
That was no fun and the only option.
 
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