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In 1996, a bolt-on bell housing was phased in (along with a six-bolt tailhousing) for S-10 Trucks and S-10 Blazers and beginning in 1998 for all other applications. Beginning in 1998 a new 300mm torque converter with improved higher-capacity internals, 300mm style input shaft, and 300mm style pump was also introduced on models coupled to a Gen ...
Crankshafts manufactured for the 1999 model year (to the end of 4.3 L (262 cu in) production) had a pilot hole depth of 1.41 in (35.8 mm) when coupled to the LSx-based 4L60E, which had a redesigned torque converter pilot hub (which was longer and was used with a 300 mm (11.8 in) stator shaft).
The large-journal connecting rods were thicker (heavier) and used 3 ⁄ 8 in (9.5 mm) diameter cap-bolts to replace the small-journal's 11/32. 1968 blocks were made in 2-bolt and 4-bolt versions with the 4-bolt center-three main caps each fastened by two additional bolts which were supported by the addition of thicker crankcase main-web bulkheads.
Four bolt holes and two locator pins are common to the Chevrolet and B-O-P patterns. Some transmissions, most notably the TH200-4R, take advantage of this by integrating both specifications into a "universal" bolt pattern casting.
The 4T60-E featured a 245 mm (9.6 in) torque converter with varying stall speed and gear ratios. For example, a 1995 Beretta features a 1650 rpm stall converter as opposed to a 1999 Century converter with a stall of 2095 rpm.
The 4L85-E (RPO MN8) is rated to handle vehicles with up to 690 ft·lbf (935 N·m) of torque. [4] The 4L85E is rated to handle vehicles with a GVWR of up to 18,000 lbs (dependent on axle ratio and vehicle) [5] Applications: 2002–2006 Chevrolet Avalanche 2500; 2001–2006 Chevrolet Suburban / GMC Yukon XL (8.1L Vortec only)