JASPER Engines & Transmissions Reviews

I purchased a JASPER replacement engine in April 2022 for my 2006 Chevrolet Tahoe. The engine has only accumulated approximately 34,000 miles and has been maintained with regular documented oil changes. Despite this, the engine has developed a major internal mechanical failure requiring significant disassembly and repair. What made this experience even more disappointing was my interaction with Jasper’s customer service. When I contacted them to discuss the premature failure, I felt that my concerns were dismissed because the engine was outside the warranty period. Rather than showing any interest in reviewing the situation or considering goodwill assistance for a major internal failure with relatively low mileage, I was simply told they would not help.

On my 4th engine from this awful company. My Ford F150 5.0 Coyote engine has been in the shop for a total of 2 months trying to get a good engine installed. Avoid this company! Low oil pressure and can sensor errors on all 4 engines. WTF. 🤬

Purchased a Jasper engine for our 2000 Ford E250 Econoline van in 2022 because it had a 100,000 mile warranty. 25000 miles and it went down. It was over the three years, however, the cost of the engine and it only last 25000 miles is ludicrous. Could have bought a significantly lower priced engine and been much better off. They did not offer any assistance. $7200 for a motor that did not last 4 years or over 25000 miles. To them - too bad, so sad. NEVER would I do that again.

I paid 6000$ for transmission. It’s running hot. The shop is telling me they charge 120 hr and JASPER only pays 85 hr so I got to pay difference. I will let y’all know how it turns out, how bad they screwed me around or if they do the right thing.

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.