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#1
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Swapping out rear end
I have an ’81 300 SD and I’m pretty certain my rear end is in need of help, my car’s rear end that is. Mine is serviceable. This is a recent acquisition and I know very little of this rig’s history, but I think it was rode hard and put away wet more than once. But, the body is nice and the engine is sound enough, so…
I found an ’85 380 SE at the local pick ‘n pull and the rear axle looks just like mine and sounds a lot tighter when you rock the wheels back and forth plus the bearings sound better than mine. My question is, is this the same part exactly? Or is the ratio different and other things different as well? I remember the old network style wrecking yards had big reference books spelling that sort of thing out but I haven’t seen that lately. Anybody know? |
#2
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Hmmm
Two ways to tell.
#1. Gear ratio stamp, I think the 380SE had a higher gear than the 300SD. #2. It is a part question, you could call and ask Phil, worst case he says it is a technical support question. Questions about Parts? Call Phil for help at 1-888-333-4642 Mon-Fri 10:30a-8:00p ET (NOT for technical support)
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#3
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The 300 SD has a 3.07:1 diff.
The 380 SE has a 2.47:1 diff. There are a couple of threads that tell the story of putting a 2.47 into a 617 powered W126. Generally, the two members that did it were quite satisfied with the end result. The engine runs much slower and quieter on the highway. However, you do give up some acceleration potential in the city with the taller ratio. |
#4
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I'd like to put a 2.47 diff in mine once my cv boots are toast, I'll have a whole rear end swap done. For now time only tells when those boots will finally give way and tear....they're in pretty bad shape.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#5
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hi carl!
ran a search for 2.47 click here:http://www.peachparts.com/shopforum/search.php?searchid=273323 the first post of the first thread is pretty detailed. told ya these guys are awesome and would point you in the right direction! see ya!
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Jeff ___ 1982 300D Turbo 150K PlantDrive Single tank WVO conversion 6000 veggie miles and counting! ----------- 1985 Ford F250 - 132K PlantDrive Two-tank WVO conversion 15,000 veggie miles and counting... Driving for FREE! |
#6
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BTW, i saw an 82 SD at dorris today, fairly fresh....
the 2.47 might be more than you want to bite off considering you have to deal with the speedo etc.
__________________
Jeff ___ 1982 300D Turbo 150K PlantDrive Single tank WVO conversion 6000 veggie miles and counting! ----------- 1985 Ford F250 - 132K PlantDrive Two-tank WVO conversion 15,000 veggie miles and counting... Driving for FREE! |
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Yo Jeff!
Yeah thanks. I did a search for that topic also after reading Brian's post and it is an interesting story. I have mixed feelings. I'm kinda tempted to try it but I'd hate to lose off the line power and I feel pretty good about my cruising speed capability as it is. If my engine were a little younger and stronger it would be a better adventure to undertake. Thanks for the Dorris tip. I was going to going to go down to the Winton Ave. 'Pull yer, pick yer, aw just take yer part' operation and see what they have so I'll drop in on Dorris as well. Have you ever checked out E & J also way out on Winton? They're quite the old school operation. It's a bit refreshing after dealing with the low budget, low common demominator Pick 'n Pull, but their stuff is not rotated all that much it seems. I did find a great seat there, however. Carl |
#8
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up late...
went to pickyerpart today on my alda hunt; nothing to speak of in the way of mbz's. a few older 78-79s. there was a bunch last time i was there. no, i'll have to check out e&j. have to go back out tomorrow to try & find a good alda. mine's not holding pressure = no fuel enrichment at boost
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Jeff ___ 1982 300D Turbo 150K PlantDrive Single tank WVO conversion 6000 veggie miles and counting! ----------- 1985 Ford F250 - 132K PlantDrive Two-tank WVO conversion 15,000 veggie miles and counting... Driving for FREE! |
#9
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Quote:
You MIGHT give up a hair of acceleration potential but my butt dyno says its no slower. Sure is a LOT more pleasant to drive. Operating a diesel engine at or near its torque peak will yield better mileage. Jim |
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