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Description
Complete Transmission Installation Kit 319-500GM TKX TKO Installation kit for 1955 1985 internally balanced Small or Big Block Chevrolet Engines These Holley Transmission Installation Kits come complete with everything you need to bolt a TKX or TKO transmission to a 1955 1985 small or big block Chevrolet engine. Built with a mixture of our best brands including Lakewood, Hays and Mr. Gasket. Kit includes: A roller pilot bearing, bellhousing with dust shield, billet steel flywheel, clutch and
GM TKX/TKO Installation kit for 1955-1985 internally balanced Small or Big Block Chevrolet Engines
These Holley Transmission Installation Kits come complete with everything you need to bolt a TKX or TKO transmission to a 1955-1985 small or big-block Chevrolet engine. Built with a mixture of our best brands including Lakewood, Hays and Mr. Gasket. Kit includes: A roller pilot bearing, bellhousing with dust shield, billet steel flywheel, clutch and pressure plate, hydraulic release bearing, and all hardware needed to install these components.
NOTES: Designed for internally balanced small block Chevy or big block Chevy engines with 2-pc rear main seal and a 2.485-inch crank register diameter.
Features:
- Designed for 1955-1985 Small and Big Block Chevrolet Engines using a TKX or TKO transmission
- Light weight cast aluminum bellhousing and stamped steel dust cover provides factory-like installation and appearance
- Billet steel 36 lb, 168 tooth neutral balanced flywheel for light weight and strength
- Roller style pilot bearing offers improved shifting by reducing parasitic drag and transmission wear
- 26 spline, 11-inch clutch disk offers superior clamping force for engines up to 500 hp
- Adjustable Hydraulic Release Bearing offers reduced pedal effort and easy installation
- Organic clutch disc features heavy-duty hub spring assembly for increased load capacity
- Works with OE (original equipment) or MSD High Torque starters
- All hardware included
Specs:
| Bellhousing Material | Aluminum |
|---|---|
| Brand | Holley |
| Disc Diameter | 11 |
| Disc Material | Organic |
| Disc Style | Spring Hub |
| Emission Code | 6 |
| Engine | Chevrolet Small Block Gen I, GM Big Block |
| Engine Balance | Internal |
| Engine Make | GM |
| Flywheel Balance | Neutral |
| Flywheel Material | Billet Steel |
| Grade Type | Performance |
| Hardware | Steel |
| Input Shaft Diameter | 1-1/8 in. |
| Input Spline | 26 |
| PILOT BEARING | Roller |
| Pressure Plate Style | Diaphragm |
| Product Type | Installation Kit |
| RELEASE BEARING | Hydraulic |
| Transmission | TKO GM, TKX GM |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 891 reviews
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Product Reviews
★★★★★ 5
Best long-lasting dog chew
If you want something to occupy your dog that's harmless, this is the one. He doesn't have to chase it, so it doesn't get lost under the cabinets, and he's been chewing it for hours and barely made a mark on it. When he's chewing on this, he's not whining or asking to sit on my lap, and he can stay nearby as he enjoys this toy.
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Reviewed in the United States on June 12, 2026
★★★★★ 4
Not perfect for every dog, but still worth a shot
I bought the bacon-flavored Benebone with high hopes after reading the reviews. Our 45lb mutt loves to chew on bones (and thankfully that's ALL she loves to chew on!) but we've had trouble finding anything that she can't destroy in one sitting. We've heard that antlers are the longest lasting but can be damaging to the dog's teeth, so we wanted to try something with a little less potential for disaster.
The Benebone wishbone fared okay. I do have to say that she loved the bone, as did our 14lb schnoodle. The first day she had it, they took turns gnawing on it for hours. Unfortunately, the large one's jaws are quite strong, and so by the end of day 1 there were some pretty significant teething marks on each of the ends, and it was starting to look pretty gnarly. I put it up for a little bit, but they've had other nylon bones that looked worse so I gave it back to them the next day.
On day 2, the little one was chewing on it so vigorously (and I think the bone was gnarly enough) that her gums started bleeding. I noticed the blood on the bone so I took it away again.
On day 3, I gave the bone back to the large one to chew on. It wasn't too long, though, until I was hearing some pretty loud snaps and I found that the large pup was actually starting to get larger pieces off of the ends of the wishbone. This had me worried, so I threw the wishbone away.
Relative to other chew toys that the large one likes (she'll only chew on bones and edibles, for some reason - nothing with any sort of rubbery material), this did actually have a decent life span, but we're still looking for something better.
I give the product 3 stars because the dogs clearly loved the bone, and I'm sure that it's perfect for some dogs. For example, if it was just our schnoodle chewing on it, it would have lasted much longer and I would probably be posting a 5-star review here. In the end, though, we did buy the wishbone for the larger dog, and it failed to hold up for her - for the price, I would have wanted something that lasts longer - hence the two star deduction.
UPDATE 8/10/2014:
Not long after I posted this review, Benebone contacted me in the comments to offer a refund and hinted at the potential for a larger bone sometime in the future. I sent in our order number and they processed the refund quickly. I've added back an extra star, because Benebone's stellar customer service has made the product worth the try. I would definitely do business with Benebone again, and I'm looking forward to trying (or rather, having my pup try) a larger version of the bone if/when it surfaces!
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Reviewed in the United States on August 7, 2014
★★★★★ 5
I Import These to Mexico That's How Good They Are
I have purchased this bone at least 10 times and will keep buying it indefinitely. I have 8 rescue dogs, all extreme chewers , we're talking dogs that destroy absolutely everything. This is the only bone I've found that holds their interest and keeps them coming back for more. I've tried every type of bone on the market. This one wins!
My dogs range from 5 lbs to 100 lbs and every single one of them is equally obsessed. I now order 5 at a time because I know they'll all be used. The price point is excellent for what you get, and after constant use across 8 dogs, I haven't noticed any negative effects on their health or teeth.
I love these so much that I actually import them to Mexico, that should tell you everything. Every time someone visits and sees how occupied and happy my dogs are, they immediately ask where they can get them too.
Benebone, you have a customer for life!!!!!!
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Aggressive Chewers' Delight!
Super strong and apparently flavorful, my aggressive chewing puppy loves this! Goes at it for ten minutes at a time, several times per day - woohoo!
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Dogs love them and they are very safe for them to chew!
These bones are indispensable if you have a chewing and destructive puppy! (Or any dog, really) ours love them and never get tired of chewing - so far we have had them for a month and no one is tired
of them or more importantly has managed to eat any of them. They are a great buy and keep dogs really occupied when they may get bored and feel like causing trouble or chewing something!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
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