JASPER Engines & Transmissions Reviews

If you’re considering a Jasper engine or transmission, I strongly urge you to think twice. My experience has been nothing short of frustrating, costly, and deeply disappointing. We are currently on our third Jasper engine. The first arrived with a cracked block, which caused an engine knock almost immediately. The second engine lasted only 39,000 miles before developing a ticking noise in the valve train due to tappets that were out of tolerance from Jasper’s factory. Now we’re left hoping the third engine doesn’t follow the same pattern.

I installed a Jasper transmission literally 3 years and 2 months ago, and my transmission shudders between 45-55 mph. The transmission literally only has only a little over 20,000 miles on it (documented). It's already malfunctioning. I spoke with a Jasper tech and his solution was to put two tubes of "shudder stop" in the trans and that should fix the problem. "Sorry you're out of warranty, we can't fix it." Wow! We really care about the quality of the product they put together for the customer. I didn't know this at the time, but there are much better choices out there with 5 year and unlimited mileage warranties out there. Good example is Go Power Train and Power Train.

GMC diesel. Head gasket and heads didn't even last 40k miles. Truck sat almost a year for us to put in a new transmission when we could. So wasn't even driven a whole year and nope, won't cover it. We were sent here for great product and warranty. Don't buy. Buyer beware.

DO NOT BUY A MOTOR FROM JASPER UNLESS YOU WANT TO BE STRANDED. My jeep motor blew up and bought one from Jasper. Everything was great until 16,000 miles and it exploded while on cruise control…. We were able to warranty replace it but not without still having to pay some labor because they wouldn’t cover enough. Here we are 10,000 miles later with ANOTHER blown up motor and we were offered a whopping 8% discount to BUY a new motor. What an absolute joke. The fact that they think that I would ever buy another motor from them just to be stuck in the same situation is CRAZY. 2 motors with a total of 26,000 miles and now I don’t have a car. Thank you for leaving me stranded.

Jasper cat C7 1.5 years old and injectors leaked fuel overnight, was told out of warranty after 1 year. I have used CAT remans for many years and have not had this problem. Next time it's a CAT reman engine. There goes $ 5,000.00 dollars. Thanks JASPER.

Had a new JASPER engine installed in 2022 for $9000. 4 years later and just outside the warranty the timing seal went bad. Estimate was $3300 to repair. I should have bought another vehicle. Will never buy Jasper again. Stay away.

So I body transmission from them at a hundred and twenty six thousand five hundred sixty one and it was done on 3/5/2023. How does anybody know anything about 2016 Chevy Tahoe LTZ? How, like the older Chevy Suburbans or Tahoes? Like, it feels like the overdrive is not kicking on it like vibrates. The whole car, can anybody tell me? Is it transmission or what is going on with this? And am I still under the warranty.

I had my original 6.7 Powerstoke replaced with a Jasper remaned engine about 2 years ago after it spun a main bearing. The remaned engine lasted approx. 5,000 miles before it also spun a main bearing. Jasper replaced the engine under warranty, which is why you have a warranty. Sold the truck after the second engine made it past the intial break in, didn't trust it to go the long distance. Do you research before you buy from them, there are better engine rebuilders out there.

Would not recommend buying these products, they do not stand behind their products' warrranty. Buyer beware. When their product fails they will not pay the labor it takes to replace product. If you pay more money when you buy the product they pay you more, to cover them. Paying 23.42 per hour to replace turbo under warranty. I don't know a tech that works for this pay. Buyer beware. Look elsewhere.

I'd give them a 0 rating if I could. I'm on my third replacement Cummins 5.9 and I doubt it'll last any longer than the first two. Less than 4000 miles on the first, less than 800 on the second, and the third has about 200. I can't trust it to go across the county yet alone the state. They replaced it both times, but I had to pay about half the labor costs. After the twice towing expenses, storage fees, and fuel cost to go across the state and back twice, I've spent probably $9000 including install labor. And the original $19000 I spent to put their crappy engine in my $32000 truck puts me at about $59k to $60k in the hole because I will not be driving it anywhere and will not sell it to an unsuspecting truck buyer. Don't trust Jasper rebuilders.