Description
Comparison points and tradeoffs
When comparing DEF Crankshaft Rear Main Seal and Wear Ring Installer Tool Replacement for Engine 4.5L 6.0L 6.4L Diesel Alt 303-770 with other Crankshaft options, use this source-backed detail as the primary discriminator: Referenced part number: ZTSE4515C.
Use this second fact to evaluate the tradeoff: Product identity: DEF Crankshaft Rear Main Seal and Wear Ring Installer Tool Replacement for Engine 4.5L 6.0L 6.4L Diesel Alt 303-770. A third point to compare across alternatives is: Category: Replacement Parts / Bearings & Seals / Seals / Crankshaft.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Works for installation of Crankshaft Rear Seal Wear Ring for 4.5L, 6.0L, 6.4L Powerstroke
Replace ZTSE4515C ZTSE4515 303-770, saving your time and money
Application:
Engine — 4.5L Diesel : Low Cab Forward : 2006-2009
Engine — 6.0L Diesel : E-Series : 2004-2010
Engine — 6.0L Diesel : F650/750 Super Duty : 2004-2007
Engine — 6.0L Diesel : Excursion : 2004-2005
Engine — 6.0L Diesel : F250/350/450/550 Super Duty : 2004-2007
Engine — 6.4L Diesel : F250/350/450/550 Super Duty : 2008-2010
VT365 International
Source product highlights
- Replacement for 4.5L Diesel – Low Cab Forward (2006-2009); 6.0L Diesel – E-Series (2004-2010); 6.0L Diesel – F650/750 Super Duty (2005-2007); 6.4L Diesel – F250/350/450/550 Super Duty (2004-2010 & VT365 International).Installation instructions are not included
- Replace to ZTSE4515C ZTSE4515 part 303-770. Universal, used to install the Crankshaft Rear Seal Wear Ring for 4.5L, 6.0L, 6.4L Powerstroke and work in an easier way to save your time and money
- All components made of high quality carbon steel, impact resiatant, excellent solid and durable
- Universal fits for installation of Crankshaft Rear Seal Wear Ring for 4.5L,6.0L,6.4L Powerstroke .This tool is needed to prevent your seal from leaking.Designed to eliminate lip flare on the wear sleeve and install the crankshaft rear seal wear ring on 4.5L, 6.0L & 6.4L powerstroke engine properly
- This rear main seal installer tool can help you install the crankshaft wear ring, rear seal and rear seal carrier effortlessly. The wear ring is automatically installed to the proper depth




Michael –
Well made worked perfectly
Brandon –
Worked just fine and I got the job done. Quality is pretty good.
Jose Luis martinez –
This tool is amazing, first time using itWas so easy to use. It does the jobOne hundred percent recommend
William Morales –
Great tool!
Sandy bishop –
Works great…fits 6.4 rear seal
MikeL –
Haven’t used it yet, but I’m impressed with the quality. It’s machined from aluminum, not welded together from steel like most of the low end seal installers I’ve bought. I would purchase again, definitely.
Marcio de medeiros –
great product worked well
jay –
Works fine.