Drive Train Specialists

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INSTALLATION

AXLE PARTS & KITS AND RINGS & PINIONS
Drive Train Specialists carries a huge selection of Quality Axle Parts. The selection is so large that we were not able to list every part. We carry Axle parts for:

AMC/JEEP AXLES

CHEVY AXLES

DANA AXLES

DODGE AXLES

FORD AXLES

GMC AXLES

TOYOTA AXLES

Call your Friendly Expert at Drive Train Specialists for Assistance.

Drive Train Specialists include - Differential parts - Differential part - Rear end parts - Truck differential - Truck rear end - 60 Axle Dana - Ring and pinion gears - Ring and pinion gear - Ring and pinion set - Differential gears

General Information
All Spicer Carrier Type axles are identified with a manufacturing date (1) and a Bill of Material number (2) stamped on the right or left hand tube on driving axles. The Bill of Material number may also be found on the carrier in some models as shown in illustration (2A). For independent front suspension (IFS) axles, the B/M number may be located at one of three locations: 1) A vertically positioned tag near the center of the right hand side support arm. 2) stamped into the left hand side support arm (opposite end of the camber adjuster), or 3) stamped into the "nose end" of the axle carrier. The location of the information will depends on the manufacturing date of the axle.

The axle model number will be cast into one of the webs as shown (3), or it can be on the nose.

Each axle contains a gear ratio tag (4), and if the axle is equipped with a limited slip differential, it will have a tag... specifying the type of limited slip lubricant to be used (5).

Refer to the appropriate model number section for parts identification and a breakdown of the Bill of Material.

Drive Train Specialists include - Differential parts - Differential part - Rear end parts - Truck differential - Truck rear end - 60 Axle Dana - Ring and pinion gears - Ring and pinion gear - Ring and pinion set - Differential gears

**Requires Bill of Material number for Proper Identification, Please Call one of our Experts for Assistance with these applications.

Model	OEM Ring and Pinion Ratio’s	OE Quality Ring and Pinion Ratio’s	Competitive Ring and Pinion Ratio’s	Bearing Kit	Small Parts	Internal Parts	Axle Shafts	Empty Diff. Cases	Posi’s
AMC MODEL 20		2.73, 3.31,3.54 4.10	3.31, 3.54,4.10	Yes	Yes		Yes		Yes
Chrysler 7.25” 10 Bolt		3.23, 3.55,3.91 4.10	3.55, 3.90	Yes	Yes	Yes	Yes	Yes
Chrysler 8.25” 10 Bolt		3.23, 3.55,3.91 4.10, 4.56	3.21, 3.55,3.90 4.10, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
Chrysler 9.25” 12 Bolt		3.23, 3.55,3.90 4.10, 4.56	3.21, 3.55,3.90 4.10, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
Dana Model 30	Yes ** See Above			Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Model 35	Yes**			Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Model 44	Yes**			Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Models 28,35 44,50 IFS	Yes**	4.56 Model 44 Rev. Cut **		Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Model 60	Yes**	Yes**	Yes**	Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Model 70	Yes**			Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Dana Model 80	Yes**			Yes**	Yes**	Yes**	Yes**	Yes**	Yes**
Ford 7.5” 10 Bolt		3.27, 3.45,3.73 4.10, 4.56	3.27, 3.45,3.73 4.10, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
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Model	OEM Ring and Pinion Ratio’s	OE Quality Ring and Pinion Ratio’s	Competitive Ring and Pinion Ratio’s	Bearing Kit	Small Parts	Internal Parts	Axle Shafts	Empty Diff. Cases	Posi’s
Ford 8.8” 10 Bolt		3.08, 3.27,3.55 3.73, 4.10,4.56	3.08, 3.27,3.55 3.73, 4.10,4.56	Yes	Yes	Yes	Yes	Yes	Yes
Ford 8.8” Sterling IFS Rev-cut		4.10, 4.56	3.31, 3.54,3.73 4.10, 4.56	Yes
Ford 9”		3.00, 3.25,3.50 3.70, 3.89,4.11 4.57, 4.86	3.00, 3.25,3.50 3.70, 3.89,4.11 4.57, 4.86,5.00 5.14, 5.29,5.43 5.67, 5.83,6.00 6.20, 6.33,6.50	Yes	Yes	Yes	Yes	Yes	Yes
Ford 9.75” Sterling		4.10, 4.56	4.10, 4.56	Yes			Yes		Yes
Ford 10.25” 12 Bolt		3.31, 3.55,3.73 4.10, 4.56	3.55, 3.73,4.10 4.56, 4.88,5.13	Yes	Yes	Yes	Yes	Yes	Yes
GM 7.5” 10 Bolt	2.73, 3.08, 3.23 3.42, 3.73, 4.10 4.30	3.08, 3.42,3.73 4.11, 4.30,4.56	3.08, 3.42,3.73 4.10, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
GM 8.5” 10 Bolt	2.73, 2.93, 3.08 3.23, 3.42, 3.73 4.10	3.08, 3.42,3.73 4.10, 4.56,4.88 5.13	3.08, 3.42,3.73 4.11, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
GM Truck 8.875” 12 Bolt		3.08, 3.42,3.73 4.11, 4.56	3.08, 3.42,3.73 4.11, 4.56	Yes	Yes	Yes	Yes	Yes	Yes
GM Car 12 Bolt		3.08, 3.42,3.73 4.11, 4.88,	3.42, 3.73,4.11 4.56	Yes			Yes		Yes
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Model	OEM Ring and Pinion Ratio’s	OE Quality Ring and Pinion Ratio’s	Competitive Ring and Pinion Ratio’s	Bearing Kit	Small Parts	Internal Parts	Axle Shafts	Empty Diff. Cases	Posi’s
GM 9.5” 14 Bolt	3.23, 3.42, 3.73 4.10, 5.56	3.73, 4.10	3.73, 4.10	Yes	Yes	Yes	Yes	Yes	Yes
GM 10.5” 14 Bolt	3.42, 3.73, 4.10 4.56, 4.88, 5.13	3.73, 4.10,4.56	3.73, 4.10,4.56	Yes	Yes	Yes	Yes	Yes	Yes
GM IFS 7.25”, 8.25” 9.25”	3.08, 3.42,3.73 4.10, 4.56			Yes	Yes	Yes		Yes	Yes
Toyota 7.8”		4.11, 4.56,4.88 5.29, 5.71	4.11, 4.56,4.88 5.29, 5.71	Yes
Toyota 7.5” IFS		4.88, 5.29	4.88, 5.29	Yes
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Gear Ratio Guide for Different Tire Sizes
When ever you change tire size from the original size to another there will be a direct effect on power and drivability. We have developed this chart to help you select the optimum gear ratio to put your performance back where you want it.

First determine your original gear ratio and tire size and follow to the intersection that should be your approximate RPM at 65 MPH. Next find your new tire size and follow that across to the closest RPM to your original and that will be first choice.

If you are interested in a change that will give more power or better fuel mileage use the color coding as a guide.

	Most Power and Towing, Reduced Fuel Economy
	Daily Driver, Best Overall Performance
	Highway Driving, Good Fuel Economy

	2.35	2.73	2.94	3.07	3.21	3.31	3.42	3.55	3.73	3.91	4.11	4.27	4.56	4.88	5.13	5.29	5.38	5.71	6.17	7.17
22	2333	2710	2919	3048	3178	3286	3395	3524	3703	3882	4080	4239	4527	4845	5093	5252	5341	5668	6125	7118
23	2231	2592	2792	2915	3048	3143	3248	3371	3542	3713	3903	4055	4330	4634	4871	5023	5109	5422	5859	6808
24	2139	2484	2675	2794	2921	3012	3112	3231	3394	3558	3740	3886	4150	4441	4668	4814	4896	5196	5615	6525
25	2053	2385	2568	2682	2804	2892	2988	3101	3259	3416	3590	3730	3984	4263	4482	4621	4700	4988	5390	6264
26	1974	2293	2470	2579	2696	2780	2873	2982	3133	3284	3452	3587	3830	4099	4309	4444	4519	4796	5183	6023
27	1901	2208	2378	2483	2597	2677	2766	2872	3017	3163	3325	3454	3689	3947	4150	4279	4352	4619	4991	5800
28	1833	2129	2293	2395	2504	2582	2668	2769	2909	3050	3206	3331	3557	3806	4001	4126	4196	4454	4813	5593
29	1770	2056	2214	2312	2417	2493	2576	2674	2809	2945	3095	3216	3434	3675	3863	3984	4052	4300	4647	5400
30	1711	1987	2140	2235	2337	2410	2490	2584	2715	2846	2992	3109	3320	3553	3735	3851	3917	4157	4492	5220
31	1656	1923	2071	2163	2261	2332	2409	2501	2628	2755	2896	3008	3213	3438	3614	3727	3790	4023	4347	5051
32	1604	1863	2007	2095	2191	2259	2334	2423	2546	2669	2905	2914	3112	3331	3501	3610	3672	3897	4211	4894
33	1555	1807	1946	2032	2124	2191	2263	2349	2469	2588	2720	2826	3018	3230	3395	3501	3561	3779	4083	4745
34	1510	1754	1889	1972	2062	2126	2197	2280	2396	2512	2640	2743	2929	3135	3295	3398	3456	3668	3963	4606
35	1466	1704	1835	1916	2003	2065	2134	2215	2328	2440	2565	2664	2845	3045	3201	3301	3357	3563	3850	4474
36	1426	1656	1784	1862	1947	2008	2075	2154	2263	2372	2493	2590	2766	2961	3112	3209	3264	3464	3743	4350
37	1387	1611	1735	1812	1895	1954	2019	2095	2202	2308	2426	2520	2692	2881	3028	3123	3176	3370	3642	4232
38	1351	1569	1690	1764	1845	1902	1966	2040	2144	2247	2362	2454	2621	2805	2948	3040	3092	3282	3546	4121
39	1316	1529	1646	1719	1798	1854	1915	1988	2089	2190	2302	2391	2554	2733	2873	2962	3013	3198	3455	4015
40	1283	1491	1605	1676	1753	1807	1867	1938	2037	2135	2244	2331	2490	2664	2801	2888	2937	3118	3369	3915
41	1252	1454	1566	1635	1710	1763	1822	1891	1987	2083	2189	2331	2494	2599	2733	2818	2866	3042	3287	3819
42	1222	1420	1529	1596	1669	1721	1778	1846	1940	2033	2137	2275	2371	2538	2668	2751	2798	2969	3208	3728
43	1194	1387	1493	1559	1630	1681	1737	1803	1894	1986	2087	2220	2316	2479	2606	2687	2733	2900	3134	3642
44	1166	1355	1459	1524	1593	1643	1698	1762	1851	1941	2040	2169	2263	2422	2545	2626	2670	2834	3063	3559

This chart is based on 65 MPH and a gear ratio of 1:1, on a manual transmission in 4th gear. Please NOTE: If you have an automatic transmission your RPM will higher due to slippage in the transmission and the torque converter. With an overdrive transmission your RPM in overdrive will be 15% to 30% less than indicated.

How To Change Gear Ratios
To increase or decrease a gear ratio, there are certain steps that must be taken. The differential case depends upon ratio desired. For each axle model, there is a high ratio and a low ratio case as illustrated below:

Axle Model	Low Ratio Case	High Ratio Case	Axle Model	Low Ratio Case	High Ratio Case
Model 27	3.73 & Down	3.92 & Up	Model 44 ICA 1985 & later	2.87 & Down	3.07 & Up
Model 28	3.45 & Down	3.73 & Up	Model 50	4.10 & Down	-
Model 28 IFS Aerostar	2.27, 3.73	-	Model 60	4.10 & Down	4.56 & Up
Model 30	3.55 & Down	3.73 & Up	Model 61 Semi Float	3.00 & 3.07 only
Model 35	2.35 only	-	Model 61 Full Float	3.31 & Down	3.54 & Up
Model 35	2.73 - 3.31	3.54 & Up	Model 70	4.10 & Down	4.56 & Up
Model 36 ICA	2.73 & Down	3.07 & Up	Model 70-3HD	3.42 & Down	3.73 & Up
Model 44	3.73 & Down	3.92 & Up	Model 70-2UA	3.07 only	-
Model 44 ICA 1984 & earlier	3.73 & Down	3.92 & Up	Model 80	3.73 & Down	4.10 & Up

Example - If you have a model 44 Rear Axle with a 3.54 ratio and wish to change to a 3.73 ratio, you change only ring gear and pinion assembly. If you change the ratio to a 4.09, you must change to a high-ratio case in addition to changing the rear gear and pinion. The application section will show you what case to use. When the vehicle is equipped with both front and rear driving axles, the gear ratios must be the same in both axles. The drive gear screws are self-locking and must be replaced with new screws each time that they are removed.
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Contact Drive Train Specialists for additional information
Light Truck Parts, Medium Duty Truck Parts & Heavy Duty Truck Parts

9809 E. 44th Pl
Tulsa, OK 74146

Rebuilt, transmission, crane carrier parts, ccc parts, fuller, eaton, rockwell, parts, new, used, mack, spicer, dana, ttc, fabco, marmom harrington, ZF, isuzu, new process, clark, borg warner, allison automatic, ford, international, navstar, IHC, oshkosh, FWD, mercedes, muncie, chelsea, Transmission, Differential, Rear End, Transfer Case, Steering box, spindle, PTO. rebuilt, new, used, transmissions, differentials, rear ends, transfer cases, steering gear, power take off units, spindles, axle housing repair, Axle shaft, axles. ring gear and pinion, parts, rebuild kits, service for all makes and models. We rebuild any transmission, differential, rear end, rearend, transfercase, steering box, spindle, PTO


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